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| 1. |
1+cosA\\sinA=sinA /1-cosA |
| Answer» ans In LHS1+cos A/SinAeach side dividing by1-cosA(1-cosA)×(1+cosA)/(1-cosA)×sinA1-cos^2A/1-cosA×sinAwe know the property =1-cos^2A=sin^2A | |