Question

Show that :

( Sin theta - 2 sin^3 theta )/ ( 2cos^3 theta - cos theta ) = tan theta

Answer 1

Hy
Sin theta - 2 sin cube theta/2cos cube theta -cos theta

= sin theta(1-2sin sq theta)/cos theta(2 cos sq theta -1)

= sin theta( cos 2 theta)/cos theta(cos 2theta)

= sin theta/cos theta

= tan theta proved
Hope it helps

Answer 2

it may be helpful. I hope you will easily understand it