SOLUTION: Which expression is equivalent to sin(theta - 2pi)? -cos(theta) cos(theta) -sin(theta) sin(theta)

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Question 1013459: Which expression is equivalent to sin(theta - 2pi)?
-cos(theta)
cos(theta)
-sin(theta)
sin(theta)
Found 2 solutions by Boreal, macston:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
It is sin (theta). 2pi is the complete circle. If you use the sum formula you will get the same thing.

Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
.
sin(theta)
-2pi radians is a complete circle (counterclockwise),
landing you back at theta.