1.

Prove the following : (1-cos2A+sin2A)/(1+cos2A+sin2A) = tanA

Answer»

SOLUTION :L.H.S. = `(1-cos2A+sin2A)/(1+cos2A+sin2A)`
`(2sin^2A+2sinAcosA)/(2cos^2A+2sinAcosA)`
`(2SINA(sinA+cosA))/(2COSA(cosA+sinA))`
TANA = R.H.S.


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