Question

(secA - 1)/(secA + 1) is equal to?

A) (1 - sin

Answer 1

Put sec A = 1/cos A

= (1-cos A)(1+cos A)/cos^2 A

= 1-cos^2 A/cos^2 A

= sin^2 A/cos^2 A

= tan^2 A

probably this will be the right answer of sec^2 A - 1 will be the answer.