Question

The value of sin 50° – sin 70° + sin 10° is ______.

विकल्प

• 0

• 1

• `1/2`

• `1/sqrt(2)`

Answer 1

The value of sin 50° – sin 70° + sin 10° is 0.

Explanation:

sin 50° + sin 10° – sin 70°

= 2 sin 30° cos 20° – cos 20°

= `cos 20^circ (2 xx 1/2 - 1)`

= 0