Question

一道数学题，要步骤

求1/sin50+√3/cos50的值

Answer 1

原式=(cos50+√3sin50)/sin50cos50
=2(cos50*1/2+sin50*√3/2)/(1/2*2sin50cos50)
=4(sin30cos50+cos30sin50)/sin100
=4sin(30+50)/sin(180-80)
=4sin80/sin80
=4

Answer 2

1/sin50+√3/cos50
=(cos50+√3sin50)/sin50cos50
=2sin80/(sin100/2)
=4

Answer 3

这要运用强悍的计算器。。。。

Answer 4

4

Answer 5

原式=(cos50+√3sin50)/sin50cos50
=4(sin30cos50+cos30sin50)/sin100
=4sin(30+50)/sin(180-80)
=4sin80/sin80
=4