在△abc中 如果 sinA:sinB:sinC=2;3;4那么cosC等于 求过程 方法 10
在△abc中如果sinA:sinB:sinC=2;3;4那么cosC等于什么求过程方法还有要数列不等式公式和方法基本例题...
在△abc中 如果 sinA:sinB:sinC=2;3;4那么cosC等于什么 求过程 方法
还有要 数列 不等式 公式和方法 基本例题 展开
还有要 数列 不等式 公式和方法 基本例题 展开
2个回答
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1.一个人总要走生疏的路，看陌生的景致，听陌生的歌，而后在某个不经意的霎时，你会发现，底本是化尽心血想要忘记的事件真的就那么忘记了。
One is always on a strange road, watching strange scenery and listening to strange music. Then one day, you will find that the things you try hard to forget are already gone.
2.幸福，不是永生不老，不是大鱼大肉，不是权倾朝野。幸福是每一个渺小的生活欲望达成。当你想吃的时候有得吃，想被爱的时候有人来爱你。
Happiness is not about being immortal nor having food or rights in one's hand. It’s about having each tiny wish come true, or having something to eat when you are hungry or having someone's love when you need love.
3.爱情是灯，友谊是影子，当灯灭了，你会发现你的四周都是影子。友人，是在最后可以给你力气的人。
Love is a lamp, while friendship is the shadow. When the lamp is off,you will find the shadow everywhere. Friend is who can give you strength at last.
4.我爱你不是因为你是谁，而是我在你眼前可以是谁。
I love you not for who you are, but for who I am before you.
5.爱情，要么让人成熟，要么让人腐化。
Love makes man grow up or sink down.
6.举得起放得下的叫举重，举得起放不下的叫负重。惋惜，大多数人的爱情，都是负重的。
If you can hold something up and put it down, it is called weight-lifting; if you can hold something up but can never put it down,it's called burden-bearing. Pitifully, most of people are bearing heavy burdens when they are in love.
7．我们每个人都生涯在各自的从前中，人们会用一分钟的时间去意识一个人，用一小时的时间去爱好一个人，再用一天的时间去爱上一个人，到最后呢，却要用一辈子的时光去忘却一个人。
We all live in the past. We take a minute to know someone, one hour to like someone, and one day to love someone, but the whole life to forget someone.
8．一个人毕生可以爱上良多的人，等你取得真正属于你的幸福之后，你就会清楚一起的伤痛实在是一种财产，它让你学会更好地去掌握和爱护你爱的人。
One may fall in love with many people during the lifetime. When you finally get your own happiness, you will understand the previous sadness is kind of treasure, which makes you better to hold and cherish the people you love.
9．年青的时候会想要谈很屡次恋爱，然而跟着年纪的增加，终于领悟到爱一个人，就算用一辈子的时间，仍是会嫌不够。缓缓地去懂得这个人，谅解这个人，直到爱上为止，是需要有十分广大的胸怀才行,classic short ugg。
When you are young, you may want several love experiences. But as time goes on, you will realize that if you really love someone, the whole life will not be enough. You need time to know, to forgive and to love. All this needs a very big mind.
10．当来日变成了今天成为了昨天，最后成为记忆里不再重要的某一天，我们忽然发现自己在人不知鬼不觉中已被时间推着向前走，这不是静止火车里，与相邻列车交织时，好像自己在前进的错觉，而是我们实在的在成长，在这件事里成了另一个自己。
When tomorrow turns in today, yesterday, and someday that no more important in your memory, we suddenly realize that we are pushed forward by time. This is not a train in still in which you may feel forward when another train goes by. It is the truth that we've all grown up. And we become different.
11．分开我就别抚慰我，要晓得每一次补缀也会遭受穿刺的痛。
If you leave me, please don't comfort me because each sewing has to meet stinging pain.
12．曾经占有的，不要忘记。不能得到的，更要珍爱。属于自己的，不要废弃。已经失去的，留作回想。
Don’t forget the things you once you owned. Treasure the things youcan’t get. Don't give up the things that belong to you and keep those lost things in memory.
13．我喜欢并习惯了对变更的货色坚持着间隔，这样才会知道什么是最不会被时间摈弃的准则。比方爱一个人，充斥变数，我于是撤退一步,cheap ugg boots，悄悄的看着,buy ugg，直到看见真挚的情感。
I love and am used to keeping a distance with those changed things.Only in this way can I know what will not be abandoned by time. For example, when you love someone, changes are all around. Then I step backward and watching it silently, then I see the true feelings.
14．男人的爱是俯视而生，而女人的爱是仰视而生。如果爱情像座山，那么男人越往上走可以俯视的女人就越多，而女人越往上走可以仰望的男人就越少。
Men love from overlooking while women love from looking up. If love is a mountain, then if men go up, more women they will see while women will see fewer men.
15．好的爱情是你通过一个人看到全部世界，坏的爱情是你为了一个人舍弃世界。
Good love makes you see the whole world from one person while bad love makes you abandon the whole world for one person.
16．在本人面前，应该一直留有一个处所，单独留在那里。然后去爱。不知道是什么，不知道是谁，不知道如何去爱，也不知道可以爱多久。只是期待一次爱情，兴许永远都没有人。可是，这种等候，就是爱情自身。
We shall always save a place for ourselves, only for ourselves. And then begin to love. Have no idea of what it is, who he is, how to love or how long it will be. Just wait for one love. Maybe no one will come out, but this kind of waiting is the love itself.
17．有谁未曾为那暗恋而苦楚？我们总认为那份薄情很重，很重，是世上最重的分量。有一天，暮然回想，咱们才发明，它始终都是很轻，很轻的。我们以为爱的很深，很深，明天将来岁月，会让你晓得，它不外很浅，很浅。最深跟最重的爱，必需和时日一起成长。
Is there anyone who hasn't suffered for the secret love? We always think that love is very heavy, heavy and could be the heaviest thing in the world. But one day, when you look back, you suddenly realize that it's always light, light. We all thought love was very deep, but in fact it's very thin. The deepest and heaviest love must grow up withthe time.
18．在这个世界上，只有真正快乐的男人，才干带给女人真正的快乐。
In this world, only those men who really feel happy can give women happiness
19．女人如果不性感，就要理性；如果没有感性,ugg schuhe，就要感性；假如没有理性，就要有自知之明；如果连这个都不了，她只有可怜。
If a woman is not sexy, she needs emotion; if she is not emotional, she needs reason; if she is not reasonable, she has to know herself clearly. coz only she has is misfortune.
20．一段不被接收的恋情，需要的不是伤心，而是时间，一段能够用来遗忘的时间。一颗被深深伤了的心，须要的不是同情，而是懂得。
An unacceptable love needs no sorrow but time- sometime for forgetting.A badly-hurt heart needs no sympathy but understanding.
21．我知道这世上有人在等我，只管我不知道我在等谁。但是因为这样，我天天都无比快活。
I know someone in the world is waiting for me, although I've no idea of who he is. But I feel happy every day for this.
22．终生至少该有一次，为了某个人而忘了本人，不求有成果，不求同行，不求曾经领有，甚至不求你爱我。只求在我最美的年华里，碰到你。
In your life, there will at least one time that you forget yourself for someone, asking for no result, no company, no ownership nor love. Just ask for meeting you in my most beautiful years.
23．我不感到人的心智成熟是越来越宽容涵盖，什么都可以接受。相反，我认为那应该是一个逐步剔除的进程，知道自己最主要的是什么，知道不主要的东西是什么。而后，做一个简略的人。
I don't think that when people grow up, they will become more broad-minded and can accept everything. Conversely, I think it's a selecting process, knowing what's the most important and what's the least. And then be a simple man.
24．当你的心真的在痛，眼泪快要流下来的时候，那就赶紧仰头看看，这片曾经属于我们的天空；当天照旧是那么的辽阔，云仍旧那么的洒脱，那就不应当哭，由于我的离去，并没有带走你的世界。
When you feel hurt and your tears are gonna to drop. Please look up and have a look at the sky once belongs to us. If the sky is still vast, clouds are still clear, you shall not cry because my leave doesn't tak eaway the world that belongs to you.
One is always on a strange road, watching strange scenery and listening to strange music. Then one day, you will find that the things you try hard to forget are already gone.
2.幸福，不是永生不老，不是大鱼大肉，不是权倾朝野。幸福是每一个渺小的生活欲望达成。当你想吃的时候有得吃，想被爱的时候有人来爱你。
Happiness is not about being immortal nor having food or rights in one's hand. It’s about having each tiny wish come true, or having something to eat when you are hungry or having someone's love when you need love.
3.爱情是灯，友谊是影子，当灯灭了，你会发现你的四周都是影子。友人，是在最后可以给你力气的人。
Love is a lamp, while friendship is the shadow. When the lamp is off,you will find the shadow everywhere. Friend is who can give you strength at last.
4.我爱你不是因为你是谁，而是我在你眼前可以是谁。
I love you not for who you are, but for who I am before you.
5.爱情，要么让人成熟，要么让人腐化。
Love makes man grow up or sink down.
6.举得起放得下的叫举重，举得起放不下的叫负重。惋惜，大多数人的爱情，都是负重的。
If you can hold something up and put it down, it is called weight-lifting; if you can hold something up but can never put it down,it's called burden-bearing. Pitifully, most of people are bearing heavy burdens when they are in love.
7．我们每个人都生涯在各自的从前中，人们会用一分钟的时间去意识一个人，用一小时的时间去爱好一个人，再用一天的时间去爱上一个人，到最后呢，却要用一辈子的时光去忘却一个人。
We all live in the past. We take a minute to know someone, one hour to like someone, and one day to love someone, but the whole life to forget someone.
8．一个人毕生可以爱上良多的人，等你取得真正属于你的幸福之后，你就会清楚一起的伤痛实在是一种财产，它让你学会更好地去掌握和爱护你爱的人。
One may fall in love with many people during the lifetime. When you finally get your own happiness, you will understand the previous sadness is kind of treasure, which makes you better to hold and cherish the people you love.
9．年青的时候会想要谈很屡次恋爱，然而跟着年纪的增加，终于领悟到爱一个人，就算用一辈子的时间，仍是会嫌不够。缓缓地去懂得这个人，谅解这个人，直到爱上为止，是需要有十分广大的胸怀才行,classic short ugg。
When you are young, you may want several love experiences. But as time goes on, you will realize that if you really love someone, the whole life will not be enough. You need time to know, to forgive and to love. All this needs a very big mind.
10．当来日变成了今天成为了昨天，最后成为记忆里不再重要的某一天，我们忽然发现自己在人不知鬼不觉中已被时间推着向前走，这不是静止火车里，与相邻列车交织时，好像自己在前进的错觉，而是我们实在的在成长，在这件事里成了另一个自己。
When tomorrow turns in today, yesterday, and someday that no more important in your memory, we suddenly realize that we are pushed forward by time. This is not a train in still in which you may feel forward when another train goes by. It is the truth that we've all grown up. And we become different.
11．分开我就别抚慰我，要晓得每一次补缀也会遭受穿刺的痛。
If you leave me, please don't comfort me because each sewing has to meet stinging pain.
12．曾经占有的，不要忘记。不能得到的，更要珍爱。属于自己的，不要废弃。已经失去的，留作回想。
Don’t forget the things you once you owned. Treasure the things youcan’t get. Don't give up the things that belong to you and keep those lost things in memory.
13．我喜欢并习惯了对变更的货色坚持着间隔，这样才会知道什么是最不会被时间摈弃的准则。比方爱一个人，充斥变数，我于是撤退一步,cheap ugg boots，悄悄的看着,buy ugg，直到看见真挚的情感。
I love and am used to keeping a distance with those changed things.Only in this way can I know what will not be abandoned by time. For example, when you love someone, changes are all around. Then I step backward and watching it silently, then I see the true feelings.
14．男人的爱是俯视而生，而女人的爱是仰视而生。如果爱情像座山，那么男人越往上走可以俯视的女人就越多，而女人越往上走可以仰望的男人就越少。
Men love from overlooking while women love from looking up. If love is a mountain, then if men go up, more women they will see while women will see fewer men.
15．好的爱情是你通过一个人看到全部世界，坏的爱情是你为了一个人舍弃世界。
Good love makes you see the whole world from one person while bad love makes you abandon the whole world for one person.
16．在本人面前，应该一直留有一个处所，单独留在那里。然后去爱。不知道是什么，不知道是谁，不知道如何去爱，也不知道可以爱多久。只是期待一次爱情，兴许永远都没有人。可是，这种等候，就是爱情自身。
We shall always save a place for ourselves, only for ourselves. And then begin to love. Have no idea of what it is, who he is, how to love or how long it will be. Just wait for one love. Maybe no one will come out, but this kind of waiting is the love itself.
17．有谁未曾为那暗恋而苦楚？我们总认为那份薄情很重，很重，是世上最重的分量。有一天，暮然回想，咱们才发明，它始终都是很轻，很轻的。我们以为爱的很深，很深，明天将来岁月，会让你晓得，它不外很浅，很浅。最深跟最重的爱，必需和时日一起成长。
Is there anyone who hasn't suffered for the secret love? We always think that love is very heavy, heavy and could be the heaviest thing in the world. But one day, when you look back, you suddenly realize that it's always light, light. We all thought love was very deep, but in fact it's very thin. The deepest and heaviest love must grow up withthe time.
18．在这个世界上，只有真正快乐的男人，才干带给女人真正的快乐。
In this world, only those men who really feel happy can give women happiness
19．女人如果不性感，就要理性；如果没有感性,ugg schuhe，就要感性；假如没有理性，就要有自知之明；如果连这个都不了，她只有可怜。
If a woman is not sexy, she needs emotion; if she is not emotional, she needs reason; if she is not reasonable, she has to know herself clearly. coz only she has is misfortune.
20．一段不被接收的恋情，需要的不是伤心，而是时间，一段能够用来遗忘的时间。一颗被深深伤了的心，须要的不是同情，而是懂得。
An unacceptable love needs no sorrow but time- sometime for forgetting.A badly-hurt heart needs no sympathy but understanding.
21．我知道这世上有人在等我，只管我不知道我在等谁。但是因为这样，我天天都无比快活。
I know someone in the world is waiting for me, although I've no idea of who he is. But I feel happy every day for this.
22．终生至少该有一次，为了某个人而忘了本人，不求有成果，不求同行，不求曾经领有，甚至不求你爱我。只求在我最美的年华里，碰到你。
In your life, there will at least one time that you forget yourself for someone, asking for no result, no company, no ownership nor love. Just ask for meeting you in my most beautiful years.
23．我不感到人的心智成熟是越来越宽容涵盖，什么都可以接受。相反，我认为那应该是一个逐步剔除的进程，知道自己最主要的是什么，知道不主要的东西是什么。而后，做一个简略的人。
I don't think that when people grow up, they will become more broad-minded and can accept everything. Conversely, I think it's a selecting process, knowing what's the most important and what's the least. And then be a simple man.
24．当你的心真的在痛，眼泪快要流下来的时候，那就赶紧仰头看看，这片曾经属于我们的天空；当天照旧是那么的辽阔，云仍旧那么的洒脱，那就不应当哭，由于我的离去，并没有带走你的世界。
When you feel hurt and your tears are gonna to drop. Please look up and have a look at the sky once belongs to us. If the sky is still vast, clouds are still clear, you shall not cry because my leave doesn't tak eaway the world that belongs to you.
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令a/sinA = b/sinB = c/sinC = k
a : b : c=ksinA : ksinB : ksinC=2:3:4
设a=2x，b=3x，c=4x
cosC=(a²+b²-c²)/2ab=(4x²+9x²-16x²)/(2*2x*3x)=-1/4
a : b : c=ksinA : ksinB : ksinC=2:3:4
设a=2x，b=3x，c=4x
cosC=(a²+b²-c²)/2ab=(4x²+9x²-16x²)/(2*2x*3x)=-1/4
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