2sin130°+sin100°(1+3tan370°)1+cos10°.=_
1个回答
展开全部
原式=
=
=
=
=
=
=
=
=
=2
故答案为2.
2sin50°+sin80°(1+
| ||
|
2sin50°+cos10°(1+
| ||||
|
=
2sin50°+cos10°+
| ||
|
2sin50°+2(
| ||||||
|
2sin50°+2sin(10°+30°) | ||
|
2(sin50°+sin40°) | ||
|
=
4sin45°cos5° | ||
|
4sin45° | ||
|
2
| ||
|
故答案为2.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询