Question 441382
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Hi
 csc(-&#952;) = -csc&#952;
 csc(-225°) = -csc225° = - 1/sin225° = {{{1/(sqrt(2)/2) = sqrt(2)}}}
(cosx,sinx) summary:
<img src="http://www.math.ucsd.edu/~jarmel/math4c/Unit_Circle_Angles.png">