If m=cosA-sinA and n=cosA+sinA show that m^2 +n^2/m^2-n^2=-1/2secA ×cosecA= (cotA+tanA)/2

If m=cosA-sinA and n=cosA+sinA show that m^2 +n^2/m^2-n^2=-1/2secA ×c

1.	If m=cosA-sinA and n=cosA+sinA show that m^2 +n^2/m^2-n^2=-1/2secA ×cosecA= (cotA+tanA)/2
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