prove that 1+cosA/1-cosA=(cosecA+cotA)whole square
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L.H.S.
1+cosA/1-cosA
=(1+cosA)(1+cosA)/(1-cosA)(1+cosA)
=(1+cosA)^2/1-cos^2A
=(1+cosA)^2/sin^2A
=[(1/sinA)+(cosA/sinA)]^2
=(cosecA+cotA)^2
=R.H.S. proved
1+cosA/1-cosA
=(1+cosA)(1+cosA)/(1-cosA)(1+cosA)
=(1+cosA)^2/1-cos^2A
=(1+cosA)^2/sin^2A
=[(1/sinA)+(cosA/sinA)]^2
=(cosecA+cotA)^2
=R.H.S. proved
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