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If 2 sin(theta+(pi)/(3))=cos(theta-(pi)/...

If 2 `sin(theta+(pi)/(3))=cos(theta-(pi)/(6))`, then `tantheta`=

A

`sqrt(3)`

B

`-(1)/(sqrt(3))`

C

`(1)/(sqrt(3))`

D

`-sqrt(3)`

Text Solution

Verified by Experts

The correct Answer is:
D

We have,
`2sin(theta+(pi)/(3))=cos(theta=(pi)/(6))`
`rArr2[sintheta"cos"(pi)/(3)+costheta"sin"(pi)/(3)]`
`=costheta"cos"(pi)/(6)+sintheta"sin"(pi)/(6)`
`rArr2[(sintheta)/(2)+(sqrt(3)costheta)/(2)]=(sqrt(3))/(2)costheta+(1)/(2)sintheta`
`rArr2sintheta+2sqrt(3)costheta=sqrt(3)costheta+sintheta`
`rArrsintheta=-sqrt(3)costheta`
`rArrtantheta=-sqrt(3)`
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