Posted by Natalie on .
Rewrite the following expression as an algebraic expression in x:
cos(arcsin(x))

Precalculus with Trig 
Reiny,
make a sketch of a rightangled triangle
label the base angle Ø, then opposite side is x
hypotenuse is 1
then the adjacent side is √(1  x^2)
so cos(arcsin(x)) = √(1x^2)1