Question

if sina =1/2 find the value of sin 3a​

Answer 1

The value of sin 3A = 1

Correct question : if sin A = 1/2 find the value of sin 3A

Given :

sin A = 1/2

To find :

The value of sin 3A

Solution :

Step 1 of 2 :

Find the measure of angle A

sin A = 1/2

⇒ sin A = sin 30°

⇒ A = 30°

∴ Measure of A = 30°

Step 2 of 2 :

Find the value of sin 3A

sin 3A

= sin (3 × 30°)

= sin 90°

= 1

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