What is the simplified value of \(\frac{{2{{\sin }^3}\theta - \sin \theta }}{{\cos \theta - 2{{\cos }^3}\theta }}?\)
(2sin3θ - sinθ)/(cosθ - 2cos3θ) = sinθ(2sin2θ - 1)/cosθ(1 - 2cos2θ)
Cos2θ = 2sin2θ - 1 = 1 - 2cos2θ
(2sin3θ - sinθ)/(cosθ - 2cos3θ) = sinθ/cosθ = tanθ3. What is the value of $\tan^{4}A+\tan^{2}A$ ?
4. If $2 cos \theta$ = $2 - sin \theta$, then what is the value of $cos \theta$?
5. What is the simplified value of \(\sqrt {\frac{{sec\;A - 1\;}}{{sec\;A + 1\;}}} ?\)
8. If a 48 m tall building has a shadow of $48\sqrt{3}$ m, then the angle of elevation of the sun is