sin B âcos 0 +11 "=, using the identitâano " o Exsmp F % s – InterviewSolution

1.	sin B âcos 0 +11 "=, using the identitâano " o Exsmp F % sin 0+ cos Osect =1+t 0, O
Answer» LHS = (sinA-cosA+1)/(sinA+cos-1) = (1 + sinA) (1 - sinA)/cos A(1 - sinA) = 1 - sin2A/cos A(1 - sinA) = cos2A/cos A(1 - sinA) = cosA/(1 - sinA) = 1/ (1/cosA - sinA/cosA) = 1/(secA - tanA) = RHS Hence Proved

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