Which of the following expressions are identical? How do you figure it out?

Question

A) cos^2x
B) (cosx)^2
C) cosx^2

Answer 1

A = (cosx)^2
B = (cosx)^2
C = cos(x^2)

A and B are the same.

By convention, a positive exponent written on the cos name is applied to the result of the cos operation. (cos^n y = [cosy]^n)

This is done so that cosx^2 can be unambigiously interpreted as cos(x^2).

Answer 2

A and B are the same


cos^2x is the same as ( cosx )^2.

Answer 3

B and C i think

its the same except fur the parenthisis