What is the value of sin 20° cos 10° + cos 20° sin 10°?

Correct option is A

Given:
sin 20° cos 10° + cos 20° sin 10°
Formula Used:
sin A cos B + cos A sin B = sin(A + B)
Solution:
Here, A = 20° and B = 10°
sin 20° cos 10° + cos 20° sin 10°
= sin(20° + 10°)
= sin 30°
= $$\frac 12$$​