Choose the correct option and justify your choice :

sin 2A = 2 sin A is true when A =

1. 0°

2. 30°

3. 45°

4. 60°

Given,

Equation : sin 2A = 2 sin A

Substituting A = 0° in L.H.S. of above equation :

⇒ sin 2(0°) = sin 0° = 0.

Substituting A = 0° in R.H.S. of above equation :

⇒ 2 sin 0° = 2 sin 0° = 0.

Since, L.H.S. = R.H.S.

Hence, Option 1 is the correct option.