Question

13. Verify: sin 2A = 2 sin A cos A, when A = 30°​

Answer 1

Step-by-step explanation:

given

A =30

At

sin 30 = 1/2

cos 30 = root 3/2

now put the all values

sin2 (30) = 2 sin 30 cos 30

• sin 60 = 2 ×1/2 ×root 3/2
• sin60 = root 3/2
• root 3/2 = 2×1/2×root 3/2
• root 3/2 = root 3/2
• ie sin 60 = cos 30