The value of (sin 7x + sin 5x) /(cos 7x + cos 5x) + (sin 9x + sin 3x) / (cos 9x + cos 3x) is

The value of (sin 7x + sin 5x) /(cos 7x + cos 5x) + (sin 9x + sin 3x) / (cos 9x + cos 3x) is

A

tan 6x

B

2 tan 6x

C

3 tan 6x

D

4 tan 6x

Answer:

The correct option is B. 2 tan 6x

Note