What do you need help with. I am really good in math
First subtract 2 revolutions from the - 840 :- (- (840-720) = -120
This gives sin -120 which is in the 3rd quadrant of the unit circle
sin -120 = - sin 60 = - sqrt3/2
Answer:
the CORRECT answers for this are B,D,E.
Step-by-step explanation:
just did it <3.