If 3sin x+4cosax =7 has at least one sol...

If `3sin x+4cosax =7` has at least one solution, then the possible values of a as

A

`(4 m )/( 4 n +1)`

B

`(2 m )/(2 n + 1)`

C

`(3 m )/( 2 n + 1)`

D

`(2 m )/(4 n + 1)`

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The correct Answer is:

A

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