Evaluate the following expressions. Your answer must be an exact angle in radians and in the interval \( [0, \pi] \). Example: Enter pi/6 for \( \frac{\pi}{6} \). (a) \( \cos ^{-1}\left(\frac{\sqrt{3}}{2}\right)=\square \) (b) \( \cos ^{-1}\left(-\frac{1}{2}\right)=\square \) (c) \( \cos ^{-1}\left(\frac{\sqrt{2}}{2}\right)=\square \)

Find an angle \( \theta \) coterminal to \( -555^{\circ} \), where \( 0^{\circ} \leq \theta<360^{\circ} \)

Fid an angle \( \theta \) coterminal to \( -561^{\circ} \), where \( 0^{\circ} \leq \theta<360^{\circ} \)

Find all solutions of the equation \( 2 \sin x+\sqrt{3}=0 \). The answer is \( A+B k \pi \) and \( C+D k \pi \) where \( k \) is any integer, \( 0<A<C<2 \pi \), \( A=\square, D=\square \) \( C=\square \) \( > \) Next Question

Find an angle \( \theta \) coterminal to \( 1256^{\circ} \), where \( 0^{\circ} \leq \theta<360^{\circ} \)

Thid an angle 9 coterminal to \( 1066^{\circ} \), where \( 0^{\circ} \leq 0<360 \)