Cos-1

Question

0

812

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How do I put "cos-1" on the calculator?

I don't know how

Guest Mar 28, 2017

Melody · Answer 1 · 2017-03-28T07:17:59

+118667

+1

inverse cos is the same as arc cos

use acos

Melody Mar 28, 2017

0

So I am supposed to answer this problem.

the problem is that I don't know what to write on the calculator....

Guest Mar 28, 2017

edited by Guest Mar 28, 2017

Melody · Answer 2 · 2017-03-28T09:19:02

The vertical red line is 0.5 units and it is opposite the angle that you want

The horozontal part of the right triangle is 0.87 units long and that is the adjacent side.

tan = opp/hyp

so

tan(v) = 0.5 / 0.87

v = atan(0.5/0.87)

atan(0.5/0.87) = 29.886526940424

v=29.88 degrees