tan? A + cot? A = sec? A cosec? A - 2
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Step-by-step explanation:
Tan^2A+cot ^2A
=Sec^2A-1+cosec^2A-1
=Sec^2A +cosec^2A-2
=1/cos^2A + 1/sin^2A —2
={(Sin^2A +cos^2A)/sin^2*cos^2A}—2
={1/sin^2A*cos^2A}—2
=Cosec^2A*sec^2A —2
=RHS
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