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cos^(2)(A-B)+cos^(2)B-2cos(A-B).cosA.cos...

`cos^(2)(A-B)+cos^(2)B-2cos(A-B).cosA.cosB=?`

A

`cos^(2)A`

B

`sin^(2)A`

C

`tan^(2)A`

D

`cot^(2)A`

Text Solution

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The correct Answer is:
B
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LUCENT PUBLICATION-ADVANCED TRIGONOMETRIC IDENTITIES-EXERCISE 13A
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