sina /(1 +cosa) =? Plz solve
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2.Sin a/2.Cos a/2 \1+2Cos*2 a/2 -1
=Sin a/2 \ Cos a/2
=Tan a/2
=Sin a/2 \ Cos a/2
=Tan a/2
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Sina/(1+cosa)×(1-cosa)/(1-cosa) sina(1-Cosa)/Sina^2 1-Cosa/sina =cosec a-cot a
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