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If `"sec" (2alpha) = "tan" beta + "cot"beta`, then one of the value of `alpha + beta` is

A

`(pi)/(4)`

B

`(pi)/(2)`

C

`pi`

D

none of these

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A
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OBJECTIVE RD SHARMA-TRIGONOMETRIC EQUATIONS AND INEQUATIONS-Exercise
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  12. If "sec"^(2) theta = sqrt(2) (1-"tan"^(2) theta), "then" theta=

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  13. The most general solution of the equation 8"tan"^(2) (theta)/(2) = 1...

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  14. The number of values of x for which "sin" 2x + "cos" 4x =2, is

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  19. The solution of the equation 1-"cos" theta = "sin" theta "sin" (theta)...

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