prove that...............
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queation is wrong ...........,
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LHS
= SinA/cosA/(sec square A) square+cosA/sinA/(cosec square A) square
= sinA/cosA(1/cos four A)+ cosA /sinA(1/sin four A)
cancel both the power . remaining square is.
= sinA/ cos A(cos cubeA)+ cosA /sinA(1/sin cubeA
= sinA/cosA/(sec square A square)+cos A/sinA/ (cosec square A square)
= sinA cos cube A+cosA.sinA
= sinA. cosA( cos square A + sin square A)
= sinA.cosA (1)
= sinAcosA (proved)
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