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The value of sin(pi/18)+sin(pi/9)+sin((2...

The value of `sin(pi/18)+sin(pi/9)+sin((2pi)/9)+sin((5pi)/18)` is

A

`sin""(7pi)/18 + sin""(4pi)/9`

B

1

C

`cos""(pi)/6 + cos""(3pi)/7`

D

`cos""(pi)/9 + sin""(pi)/9.`

Text Solution

Verified by Experts

The correct Answer is:
A
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