Practicing Success
The value of $\frac{2 cos^3 θ−cos θ}{sin θ−2 sin^3 θ}$ is: |
sec θ sin θ cot θ tan θ |
cot θ |
\(\frac{2 cos³θ - cosθ}{sinθ - 2sin³θ }\) = \(\frac{cosθ(2 cos²θ - 1)}{sinθ( 1 - 2sin²θ) }\) { using , 2 cos²θ - 1 = cos 2θ = 1 - 2sin²θ } = \(\frac{cosθ}{sinθ }\) = cotθ |