Question

if sin 3A=cos 6A then A=?​

Answer 1

Answer:

A = 10 °

Step-by-step explanation:

sin 3A = cos 6A

sin 3A = sin (90° — 6A)

• since, cos A = sin (90°— A)

• taking away sine( from both sides)

we get,

3A = 90° — 6A

3A + 6A = 90°

9A = 90°

A = 90°/9

so, A = 10°