Given: \( \Varangle A=120^{\circ}, \Varangle B=30^{\circ} \) and \( a=9 \); find \( b \) using exact values.

23. El menor valor del ángulo \( x\left(0^{\circ} \leq x<180^{\circ}\right) \) que satisface la ecuación trigonométrica \( \cos ^{2}(x)-3 \cdot \operatorname{sen}^{2}(x)=0 \) es: A. \( 120^{\circ} \) B. \( 30^{\circ} \) C. \( 150^{\circ} \) D. \( 60^{\circ} \)

22. If \( \cos \theta=\frac{-15}{17} \) and \( \theta \) is obiuse, find without using tables the values of a) \( \operatorname{tun} \theta \) (2mks) \( \quad \sin \left(180^{\circ}-\theta\right) \)

4. (s) Diben \( \operatorname{lan} \theta=-1.4826 \) dan \( 180^{\circ} \leq \theta \leq 360^{\circ} \) hilung sudul \( \theta \) Given than \( \tan \theta=-1.4826 \) ond \( 180^{\circ} \leq 0 \leq 360^{\circ} \). calculate angle \( \theta \)

In a right triangle, if one angle measures 30 degrees and the length of the side opposite this angle is 5 units, what is the length of the hypotenuse?

Which of the following can be written as \( \sin 9 x \) ? \( \begin{array}{l}\sin 5 x \cos 4 x-\cos 5 x \sin 4 x \\ \sin 5 x \cos 4 x+\cos 5 x \sin 4 x \\ \cos ^{2} 5 x-\sin ^{2} 4 x \\ 0 \cos ^{2} 5 x+\sin ^{2} 4 x \\ \text {-out of } 1 \\ \text { Previous page }\end{array} \) P