Question

Sin2x= ____.

a. 1/2(cos(a-b)-cos(a+b))
b. 2 sin x cos x
c. 1-2 sin^2 x
d. 2 sin x +2 cos x

Answer 1

The correct answer is c. 1-2 sin^2 x.

Step-by-step explanation:

The correct answer is c. 1-2 sin^2 x.

To find the value of sin 2x, we can use the double angle formula for sine, which states that sin 2x = 2sin x cos x. Therefore, b. 2 sin x cos x is the correct answer choice.