Question

Can someone check please to see if i am on the right track...
1.)arc sin (-sqrt (3)/2)=-pie/3
2.)cot(tan inverse 5) =1/5
3.)cos inverse (sin 5pie/4)=s sqrt(2)/2
d)sin (sin inverse 2/3)=2/3

Answer 1

yes, looks good except for 3.

Answer 2

its negative square root 2/2?

Answer 3

I am thinking inverse cos should return an angle