Question

cos² 30° + sin² 30°

Options

• `sqrt3/2 + 1/4`

• `5/4`

• 1

• `(sqrt3 + 1)/2`

Answer 1

1

Explanation:

cos 30° = `sqrt3/2 = (sqrt3/2)^2 = 3/4`

sin 30° = `1/2 = (1/2)^2 = 1/4`

= `3/4 + 1/4`

= 1