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The maximum value of 1+sin((pi)/(6)+thet...

The maximum value of `1+sin((pi)/(6)+theta)+2cos((pi)/(3)-theta)` for real values of `theta` is

A

3

B

5

C

4

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C

`f(theta)=1+sin((pi)/(6)+theta)+2cos((pi)/(3)-theta)`
`=1+sin((pi)/(6)+theta)+2 sin ((pi)/(2)-((pi)/(3)-theta))`
`=1+sin((pi)/(6)+theta)+2 sin((pi)/(6)+theta)`
`=1+3 sin ((pi)/(6)+theta)`
`therefore` Maximum value of `f(theta)` is 4.
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