Question

Sin 2A = 2 sin A is true when A =
(a)0°
(b)30°
(c)45°
(d)60°

Answer 1

SOLUTION :  

The correct option is (a) : sin 0°

Given : sin 2A = 2 sin A

sin 2A = 2 sin A

When , A = 0° , then  

sin (2 × 0° ) = 2 sin (0°)

sin ( 0° ) = 2 × 0

[ sin 0° = 0]

0 = 0

So, for A = 0 , the given statement is true.  

Hence, A is equal to 0° .

HOPE THIS ANSWER WILL HELP YOU…

Answer 2

Answer:

Step-by-step explanation:

Sin 0° = 0 and Sin 2 x 0° = Sin 0° = 0

Sin 30° = ½ But Sin 2 x 30° = Sin 60° is not equal to Sin 30°. The same holds true for sin 45° and sin 60