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If a=1/(5cosx+12sinx) then for all real ...

If `a=1/(5cosx+12sinx)` then for all real x.

A

the least positive value of a is `1/14`

B

the greatest negative value of a is `-1/13`

C

`a lt=1/13`

D

`-1/13 lt=a lt=1/13.`

Text Solution

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The correct Answer is:
B
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