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CBSE Class 10 Answered

Please prove the Trigonometric identity
Asked by | 19 Jun, 2009, 10:45: PM
answered-by-expert Expert Answer

L.H.S=sec A ( 1 - sin A ) ( secA + tan A ) =1/cosA (1-sinA)(1/cosA +sinA/cosA)=(1-sinA)(1+sinA)/cos2A=(1-sin2A)/cos2A=cos2A/cos2A=1=R.H.S

Hence given identity has been proved.

Answered by | 20 Jun, 2009, 05:20: PM
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