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If a straight line makes angles alpha,be...

If a straight line makes angles `alpha,beta,gamma` with the coordinate axes, then `(1-"tan"^(2)alpha)/(1+"tan"^(2)alpha)+1/("sec"2beta)-2"sin"^(2)gamma` is equal to

A

-1

B

1

C

-2

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
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