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Solutions of the equations "cos"^(2) ((1...

Solutions of the equations `"cos"^(2) ((1)/(2) px)+ "cos"^(2) ((1)/(2) qx) = 1` form an arithmetic progression with common difference

A

`(2)/(p+q)`

B

`(2)/(p-q)`

C

`(pi)/(p+q)`

D

none of these

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The correct Answer is:
D
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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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  19. The solution of the equation 1-"cos" theta = "sin" theta "sin" (theta)...

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