Question

prove that (cos theta- 2cos^3 theta)/2 sin^3 theta- sin theta
please very fast​

Answer 1

Answer:

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

Step-by-step explanation:

pls mark brainiest

Answer 2

Answer:

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