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Find all values of k for which the syste...

Find all values of k for which the system of equation have solution `sin x cos 2y =(k^(2)-1)^(2)+1` , cos x sin 2y =k +1 alos find general values of x and y

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The correct Answer is:
`k=-1,x=(n+m)pi+(pi)/(2)` and `y=1/2(n-m)pi;n,m in 1`
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