Answer is C on 10
Step-by-step explanation:
c
C is your best friend for this question
sin (x) = -1
arcsin (-1) = x
x = -90
and multiples of 360
x =-90, 270,....
x =-90 + 360n where n is an integer
or in radians
-pi/2 + 2*pi *n where n is an integer
Answer:

Step-by-step explanation:
22.5 can be written as a mixed number:

And also as an improper fraction: