How do you simplify cos(arcsin(x3))?

2 Answers
Jul 28, 2016

1x29

Explanation:

Let a=arcsin(x3) is in Q1 or Q4..

Then,sina=x3andcosa=1x290, in Q1 and Q4.

The given expression is cos a.

Jul 28, 2016

cos[arcsin(x3)]=9x23 1x29

Explanation:

arcsin(x3) returns the angle θ

Tony B
cos(θ)=9x23

cos(arcsin(x3))=9x23