Question

Howdy! Id love to have these questions answered asap! Thank you for the help!

Answer 1

Answer:

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. $Cos (-90^o)=0$, and not undefined

B. $Sin (-90^o)=-1$. This is correct

C.  $Tan (-90^o)$ is undefined, not zero

Thus the only correct option is B.