Howdy! id love to have these questions answered asap! you for the !

1) which angle is not coterminal to 120 degrees?
a. 840
b. -180
c. 480

2) use the unit circle and the reference angle to determine which of the following trigonometric values is correct when theta = -90
a. cos theta = undefined
b. sin theta = -1
c. tan = 0

1. B.

2. B.

Step-by-step explanation:

Trigonometry

1) Coterminal angles can be found by adding or subtracting 360° (or 2\pi radians) to a given angle. If we have 120°, adding 360° gives 480°, adding again 360° gives 840°. There is no way to get -180°, so this option is not a coterminal angle to 120°

2)

A. , and not undefined

B. . This is correct

C.   is undefined, not zero

Thus the only correct option is B.

A, C, D, on Edge 2020

Step-by-step explanation: