Question

i need solution hejehejehdhdhdhdjdhshdhd

Answer 1

L.H.S
=2 cos2 A-(sin2 A+cos2 A)/sin A cos A
=2 cos2 A-sin2A-cos2 A/sin A cos A
=cos2 A- sin2 A/sin A cos A
=cos2A/sin A cosA -sin2 A /sin A cos A
=cos A/sin A-sin A/cos A
=cot A-tan A=R.H.S
                     hence proved.