Question

URGENT!!! WILL AWARD ALL POINTS Which expression is equivalent to sin(2β)sinβ for all values of β for which sin(2β)sinβ is defined?
Select the correct answer below:


2sin2β−tan2β

cot2β−2cos2β

1−tan2β

csc2β−2

2cosβ

Answer 1

Answer:

sin2b sin b

2 sin b cos b sin b

2 cos b sin^2 b

1−cos2b cos b

1- (2cos^2 b−1) cosb

2 cos beta