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(i) Solve: cos(2x + 3y)=1/2, cos(3x+2y) ...

(i) Solve: `cos(2x + 3y)=1/2, cos(3x+2y) = sqrt(3)/2`
(ii) If `0 lt x lt pi, 0 lt y lt pi` and `cosx + cosy - cos(x+y)=3/2`, prove that `x=y=pi/3`.

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`x=1/5[2(3m-2n)pi +- pi/2 +- (2pi)/3], y=1/6[2(3n-2m)pi +- pi +- pi/3]`, where m and n are integers.
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CHHAYA PUBLICATION-GENERAL SOLUTIONS OF TRIGNOMETRIC EQUATIONS -Long Answer type questions
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  13. (i) Solve: cos(2x + 3y)=1/2, cos(3x+2y) = sqrt(3)/2 (ii) If 0 lt x l...

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