1.

The value of sin(π/18)+sin(π/9)+sin(2π/9)+sin(5π/18) is given by(A) sin(7π/18)+sin(4π/9)(B) 1(C) cos(π/6)+cos(3π/7)(D) cos(π/9)+sin(π/9)

Answer»

Answer is (A) sin(7π/18)+sin(4π/9)



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