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The value of (cos^4 1^@+cos^4 2^@+....+c...

The value of `(cos^4 1^@+cos^4 2^@+....+cos^4 179^@)-(sin^4 1^@+sin^4 2^@+.....+sin^4 179^@)` equals

A

`2cos1^(@)`

B

-1

C

`2 sin 1^(@)`

D

0

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The correct Answer is:
B
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