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The expression (cos 6x+6cos 4x+15 cos...

The expression
`(cos 6x+6cos 4x+15 cos 2x+10)/(cos 5x+5 cos 3x+10 cos x)`

A

cos 2x

B

2 cos x

C

`cos^(2) x`

D

`1+ cos x`

Text Solution

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The correct Answer is:
B
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