If theta=3alphaand sin theta=(A)/(sqrt(...

If `theta=3alphaand sin theta=(A)/(sqrt(a^(2)+b^(2)))` , then the value of the expression a `cosexalpha-bsecalpha` is

A

`(a)/(sqrt(a^(2)+b^(2)))`

B

`2sqrt(a^(2)+b^(2))`

C

a+b

D

none of these

Verified by Experts

The correct Answer is:

B

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