Question

What is the formula of sin2x

Answer 1

2 sinx cosx ...............

Answer 2

Nor will taking half of sin x, give you sin (x/2). We can develop the double angle formulas directly by using the addition formulas for sine, cosine and tangent. Similarly, you can find the cos 2x and tan 2x. 1) Find the sin 2x if cos x = 3/5 and x is in quadrant I.