삼각함수

[T] As a point P moves around a circle, the measure of the angle changes. The measure of how fast the angle is changing is called angular speed, $\omega ,$ and is given by $\omega =\theta /t,$ where $\theta$ is in radians and t is time. Find the angular speed for the given data. Round to the nearest thousandth.

a. $\theta =\frac{7\pi }{4}\text{rad},t=10$ sec b. $\theta =\frac{3\pi }{5}\text{rad},t=8$ sec c. $\theta =\frac{2\pi }{9}\text{rad},t=1$ min d. $\theta =23.76\text{rad,}t=14$ min