If \( \theta=-\frac{\pi}{2} \), then find exact values for the following. If the trigonometric function is undefined for \( \theta=-\frac{\pi}{2} \), enter DNE. \( \sec (\theta) \) equals DNE \( \csc (\theta) \) equals -1 \( \tan (\theta) \) equals DNE

166 Un angolo alla circonferenza ha ampiezza \( \alpha \) e \( \cos \alpha=\frac{8}{17} \). Trova seno e coseno del corrispondente angolo al centro. 808 \( \left[\sin \beta=\frac{240}{289} ; \cos \beta=-\frac{161}{289}\right] \)

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

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

Solve \( 8 \sin (6 x)=7 \) for the two smallest positive solutions \( A \) and \( B \), with \( A<B \) \( A=\square \) \( B=\square \) Give your answers accurate to at least two decimal places.

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