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1.
Convert the angle - 240o to radian measure.
 a. $\frac{2\pi }{3}$ radians b. - $\frac{2\pi }{3}$ radians c. $\frac{4\pi }{3}$ radians d. - $\frac{4\pi }{3}$ radians

2.
Convert the angle 20o15′ to radian measure.
 a. $\frac{9\pi }{80}$ radians b. $\frac{\pi }{36}$ radians c. $\frac{\pi }{9}$ radians d. $\frac{\pi }{8}$ radians

3.
Convert the angle 450o to radian measure.
 a. $\frac{5\pi }{2}$ radians b. $\frac{5\pi }{3}$ radians c. 2π radians d. $\frac{5\pi }{4}$ radians

4.
Convert the angle 150o to radian measure.
 a. $\frac{3\pi }{2}$ radians b. $\frac{5\pi }{6}$ radians c. 2π radians d. $\frac{5\pi }{3}$ radians

5.
Which one of the angles is coterminal with the given angle 460°?
 a. 360° b. 100° c. 160° d. 60°

6.
Which angle between 0° and 360° is coterminal with the angle - 400°?
 a. 320° b. - 40° c. 40° d. 60°

7.
Which angle between 0° and 360° is coterminal with the angle - 78°?
 a. 22° b. 282° c. 78° d. 222°

8.
Find a positive angle which is coterminal with the angle - 250°.
 a. 140° b. 110° c. - 140° d. - 110°