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The value of x , 0 le x le (pi)/2 which...

The value of x ` , 0 le x le (pi)/2` which satisfy the equation ` 81^( sin^(2)x)+81^(cos^(2)x)=30 ` are

A

`(pi)/(6), (pi)/(3)`

B

`(pi)/(3), (5pi)/(2)`

C

`(5pi)/(6), (pi)/(6)`

D

`(2pi)/(3), (pi)/(3)`

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The correct Answer is:
A
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OBJECTIVE RD SHARMA ENGLISH-TRIGONOMETRIC EQUATIONS AND INEQUATIONS-Chapter Test
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  19. The set of values of x in (-pi, pi) satisfying the inequation |4"sin" ...

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