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Questions  >>  CBSE XI  >>  Math  >>  Trigonometric Functions
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If θ lies in the first quadrant and cosθ=817,then the value of cos(30+θ)+cos(45θ)+cos(120θ) ?

(A)23(321)34(B)23(3+2+1)34(C)34(321)23(D)23(234)34

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