Question

Question #2077e

Answer 1

This can't be proved, it is not an identity.

Explanation:

An identity states that this is true for all `x`.

Let `x=pi/2`

`2sin^2(pi/2)+14sin(pi/2)cos(pi/2)+50cos^2(pi/2)=26`

`2(1)+14(1)(0)+50(0)=26`

`2!=26`

FALSE