-n^2 %2B n^2=4*sqrt(m*n) – InterviewSolution

InterviewSolution

1.	-n^2 %2B n^2=4sqrt(mn)
Answer» tanx+ secx=m; tanx-sinx=n; m^2-n^2=(tanx+ sinx)^2=tanx^2+sinx^2+2 tanxsinx____(1), (tanx-sinx)^2=tanx^2+sinx^3-2tanxsinx; m^2-n^2=tanx^2+sinx^2+2tanxsinx-tanx^2-sin^2+2:tanxsinx; 4tanxsinx=4Vmn

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