Question

cos² 45° + sin² 60° + sin² 30° = ______.

विकल्प

• 1

• `1 1/4`

• `1 1/2`

• `1 1/3`

Answer 1

cos² 45° + sin² 60° + sin² 30° = `underlinebb(1 1/2)`.

Explanation:

`cos^2 45° = 1/2, sin^2 60° = 3/4, sin^2 30° = 1/4`

`1/2 + 3/4 + 1/4 = 3/2 = 1 1/2`.