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If cos theta + sec theta = 2 then cos^(n...

If `cos theta + sec theta = 2` then `cos^(n)theta+ sec^(n)theta` is equal to ___

A

`2^(n)`

B

2

C

`(-2)^(n)`

D

none of these

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A DAS GUPTA-Circular Functions, Identities -Exercise
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  12. If alpha, beta be the solutions of theta for the equation a tan theta...

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  15. If tan theta + tan (pi/3 +theta) + tan (frac{2pi}{3}+ theta) = k tan 3...

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  16. The value of sin sqrt(x^(2) - pi^(2)/36) lies in the interval

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