1. the period of the function $\displaystyle y= cos3x$ in radians is $\displaystyle 3 \pi$

2. the phase shift of the function $\displaystyle y=3sin5( \theta - \frac{\pi}{4})$ is $\displaystyle \frac{\pi}{4}$

3. the vertical shift of the function $\displaystyle y=3tan2(4 \theta - \frac{\pi}{2})+5$ is 5

4. the phase shift of the function $\displaystyle y=5sin(2x+6)-7$ is 7 units left