SOLUTION: The value(s) of x when sin(x) = -1 are x = -90° and 270°?

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Question 456804: The value(s) of x when sin(x) = -1 are x = -90° and 270°?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
That's true.
-90 and +270 are coterminal, they get you to the same place.
sin(-90) = sin(270) = -1