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(cos^(2)33^(@)-cos^(2)57^(@))/(sin21^(@)...

`(cos^(2)33^(@)-cos^(2)57^(@))/(sin21^(@)-cos21^(@))=`

A

`(1)/(sqrt(2))`

B

`-(1)/(sqrt(2))`

C

`(sqrt(3))/(2)`

D

`(-sqrt(3))/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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