Which of the following is an identity for 2 cos 2xsin 2x Wha

Which of the following is an identity for 2 cos 2x/sin 2x? What does 2 cos 2x/sin 2x equal? 0 cot x - tan x sec times csc x tan x - cot x

Solution

2cos2x/sin2x

2(2cos^2x -1)/2sinxcosx

= (2cos^2x -1)/sinxcosx

= ( cos^2x - sin^2x)/sinxcosx

= cosx/sinx - sinx/cosx

= cotx - tanx

Option B