What is the value of [(sin 7x â€“ sin 5x)Ã·(cos 7x + cos 5x)] � – McqOptions

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1.	What is the value of [(sin 7x â€“ sin 5x)Ã·(cos 7x + cos 5x)] â€“ [(cos 6x â€“ cos 4x)Ã·(sin 6x + sin 4x)]?
A.	1
B.	2 tan x
C.	tan 2 x
D.	tan (3 x/2)
Answer» C. tan 2 x

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