Question

If 2sin 3A − 1 = 0 ; the value of angle A is ______.

Options

• 20°

• 60°

• 10°

• 30°

Answer 1

If 2sin 3A − 1 = 0 ; the value of angle A is 10°.

Explanation:

Given 2sin 3A − 1 = 0

\[\sin 3A = \frac{1}{2}\].

Since \[\sin 30^\circ = \frac{1}{2}\],

we have 3A = 30°, which gives \[A = \frac{30^\circ}{3} = 10^\circ\].