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What is the value of {sin (x+y) -2 si...

What is the value of `{sin (x+y) -2 sin x+ sin(x-y)} /[cos (x-y) +cos (x+ y)-2 cos x] xx [(sin 10x- sin 8x)/ (cos-10x + cos 8x)]`?
`{[sin (x+y] -2 sin x+ sin(x-y)}//[cos (x-y) +cos (x+ y)-2 cos x]} xx [(sin 10x-sin 8x)//(cos10x + cos 8x)]` का मान क्या है?

A

0

B

`tan^2 x`

C

1

D

2 tan x

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