What is the value of {[sin (x + y) – 2 sin x + sin (x – y)]/[cos (x – y) + cos (x + y) – 2 cos x]} × [(sin 10x – sin 8x)/(cos 10x + cos 8x)]?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. tan2x
= tanx × tanx
= tan2x