Question

ILL GIVE YOU BRAINLIEST!!!!!!!which expression is equivalent to cos(1.4x)-cos(0.6x)?

A: -2sin x sin(0.4x)
B: 2sin x sin(0.4x)
C: -2cos x cos(0.4x)
D: 2cos x cos(0.4x)

Answer 1

Answer:

B

Step-by-step explanation:

Answer 2

Answer:

A. -2sin x sin(0.4x)

Explanation:

I got it correct in my test :)