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If theta lies in the first quadrant and ...

If `theta` lies in the first quadrant and `costheta=(8)/(17)`, then find the value of `cos(30^(@)+theta)+cos(45^(@)-theta)+cos(120^(@)-theta)`.

Text Solution

Verified by Experts

The correct Answer is:
`(23)/(17)((sqrt(3)-1)/(2)+(1)/(sqrt(2)))`
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