Solve this please

1/cos^2 (1-cos) = sin^2/cos^2

     Multiply both sides by cos^2

1-cos = sin^2                      sin^2= 1-cos^2

1-cos = 1-cos^2

-cos=-cos^2

cos = cos^2        divide by cos

1=cos

arccos(1) = 0 degrees    (or 0 Radians)

sec^2x(1-cos)=tan^2x