Question

which of the following are the pairs of angles are coterminal 3 30 degree minus 60 degree

Answer 1

Two angles are coterminal if the difference between them is a multiple of 360° or 2π.
$$\begin{gathered} 330°-\left(-60°\right) \\ =330°+60° \\ =390°\mathrm{which}\mathrm{is}\mathrm{not}\mathrm{a}\mathrm{multiple}\mathrm{of}360° \\ \mathrm{So}\mathrm{angles}330°\mathrm{and}-60°\mathrm{are}\mathrm{not}\mathrm{coterminal}\mathrm{angles}. \\ \mathrm{Note}: \\ \mathrm{In}\mathrm{the}\mathrm{question},\mathrm{assuming}\mathrm{following}\mathrm{pairs}\mathrm{of}\mathrm{angles}\mathrm{is}330°\mathrm{and}-60° \end{gathered}$$