Question

(3 sin² 30° – 4 cos² 60°) is equal to ______.

Options

• `5/4`

• `-3/4`

• `-1/4`

• `-9/4`

Answer 1

(3 sin² 30° – 4 cos² 60°) is equal to `underlinebb(-1/4)`.

Explanation:

`\implies` 3 sin² 30° – 4 cos² 60°

`\implies 3 xx (1/2)^2 - 4 xx (1/2)^2`

`\implies - 1/4`