Question

If the angle $\theta =-60°$, find $\cos \theta \mathrm{and}\cos ec\theta$.

Answer 1

Given: $\theta =-60°$
$$\begin{gathered} \mathrm{Now},\cos \theta =\cos \left(-60°\right) \\ =\cos 60°=\frac{1}{2} \\ \mathrm{Also},\mathrm{cosec}\theta =\mathrm{cosec}\left(-60°\right) \\ =-\mathrm{cosec}\left(60°\right)=-\frac{2}{\sqrt{3}} \end{gathered}$$