Prove that (secA - cosA) (cotA + tanA) = tanA . secA Share with your friends Share 6 Manbar Singh answered this LHS = sec A - cos A cot A + tan A= 1cos A - cos A cos Asin A + sin Acos A=1 - cos2Acos Acos2A + sin2Asin A . cos A=sin2Acos A × 1sin A . cos A=sin Acos A × 1cos A= tan A . sec A=RHS 26 View Full Answer