If you know one angle of a right triangle is 50 degrees, can you determine the measure of the missing angle? If so, what is it?

б) \( \sin ^{2} x \cdot \cos x=0 \) 2) \( \sin 3 x+\sin x=0 \)

If the adjacent side measures 8 meters and the angle opposite to it is 45 degrees, calculate the length of the opposite side using trigonometric ratios.

\( \sin 20 ^ { \circ } \sin 4 \theta ^ { \circ } \sin 80 ^ { \circ } \)

Найдите множество значений функции \( y=4 \cos x-3 \) \( y \in(-1 ; 1) \)

13. а) Решите уравнение \( \sin 2 x \sin x+\sqrt{2} \cos ^{2} x=\sqrt{2} \). б) Укажите корни уравнения, принадлежащие отрезку \( \left[\frac{3 \pi}{2} ; 3 \pi\right] \)