Question

P.T 1-tan’A=1-2 sin’A
1+tan A
2​

Answer 1

Answer:

{1-(sin^2 A/cos^2 A)}/{1+(sin^2 A/cos^2 A)}

={cos^2 A- sin^2 A}/(cos^2 A+sin^2 A)

=cos^2 A - sin^2 A

=1- sin^2 A - sin^2 A

=1-2sin^2 A