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For 0 lt x lt pi the values of x which s...

For `0 lt x lt pi` the values of x which satisfy then relation `9^(1+|cos x|+ |cos^(2) x| + | cos^(3)x| +…)` upto `oo =3^(4)` are given by

A

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

B

`(pi)/(3),(3pi)/(4)`

C

`(pi)/(4),(3pi)/(4)`

D

`(pi),(3),(pi)/(4)`

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A
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MCGROW HILL PUBLICATION-PROGRESSIONS-SOLVED EXAMPLES LEVEL -1 (SINGLE CORRECT ANSWER TYPE QUESTIONS)
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