Question

Simplify 3sin²θ−3.
simplify

Answer 1

- 3cos²Θ

Explanation:

using the identity

sin²Θ + cos²Θ = 1 , then

sin²Θ = 1 - cos²Θ

given

3sin²Θ - 3

= 3(1 - cos²Θ) - 3

= 3 - 3cos²Θ - 3

= - 3cos²Θ