Question

If cos x = 2 sin x, so the value of sin x cos x is ...

Answer 1

1/2

Explanation:

As cosx= 2sinx,

now,

so, sinxcosx = sinx(2sinx) = 2 sin²x

Again,

2sin²x =1

sin²x= 1/2

sinx = 1/ root 2

sinx = sin 30

x = 30