Select your answer Which angle is coterminal to the angle \( 50^{\circ} \) ?

3) \( \sin \frac{3 \pi}{2}+\cos \frac{\pi}{2}+\sin ^{2} \frac{\pi}{4} \)

\( 2 B \sin 45 ^ { \circ } - 3 \operatorname { atg } 0 ^ { \circ } - \operatorname { atg } 45 ^ { \circ } \)

\( \begin{array}{ll}\text { 1. } y=2 \operatorname{sen} 3 x & \text { 5. } y=-\cos 2 x \\ \text { 2. } y=2 \cos 4 x & \text { 6. } y=\operatorname{sen}(-x) \\ \text { 3. } y=1+2 \cos 3 x & \text { 7. } y=1-2 \operatorname{sen} 3 x \\ \text { 4. } y=4 \tan \frac{1}{2} x & \text { 8. } y=3-\operatorname{sen} \frac{x}{2} \\ & \end{array} \)

5) \( 2 \operatorname{tg}^{2} \frac{\pi}{3}-\operatorname{ctg}^{2} \frac{\pi}{6}-\sin \frac{\pi}{6} \cdot \cos \frac{\pi}{3} \)

4) \( 3 \sin \frac{\pi}{6}+2 \cos \frac{\pi}{6}-\operatorname{tg} \frac{\pi}{3} \)