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cos^(2)10^(@)+cos^(2)50^(@)-cos10^(@)cos...

`cos^(2)10^(@)+cos^(2)50^(@)-cos10^(@)cos50^(@)` is equal to

A

`(3)/(2)`

B

`(3)/(4)`

C

`(3)/(2)(cos20^(@)+1)`

D

`(3)/(4)(cos20^(@)+1)`

Text Solution

Verified by Experts

The correct Answer is:
B
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