Q:

11-16State if the given angles are coterminal.11) 185°, -545° 12)17(pi)/36 , 161(pi)/36Find a coterminal angle between 0° and 360°.13) -330° 14) -435°15) 640°16) -442°

Accepted Solution

A:
Answer:See below in bold.Step-by-step explanation: To do these we add or subtract 360 degrees or 2 pi radians. Sometimes multiple actions are required.11.  Adding  360 to -545:= -185185 + 360 = 175The other angle is 185 degrees so they are not coterminal.12.  161pi/36 - 2pi= 161pi /36 - 72pi/36= 89pi/3689pi/36 - 72pi/36= 17pi/36.So these are coterminal.13. -330 + 360 = 30 degrees.14. -435 + 360= -75-75 + 360 = 285 degrees15.  640 - 360 = 280 degrees.16. -442 + 360 = -82-82 + 360 = 278 degrees.