Give me the solution of this question : sec A (1-sin A)(secA+tanA)

1.	Give me the solution of this question : sec A (1-sin A)(secA+tanA)
Answer» 1 =sec A(1 - sin A)(sec A + tanA)= 1/ cos A(1-sinA)(1/cosA + sinA/cosA)=(1- sinA)(1 + sinA)/cosA ×cosA= 1 - sin^2 A/cos^2 A=cos^2 A/ cos^2 A [[ since, cos^2 A + sin^2 A = 1]]= 1

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