SOLUTION: find cos(a) if sin(a)=2/3 and terminates in quadrant 3

Question 823309: find cos(a) if sin(a)=2/3 and terminates in quadrant 3

Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!

The sine cannot be a positive number if the angle terminates 
in quadrant 3.  Either it was supposed to be -2/3 instead of 2/3
or else the quadrant was supposed to be 1 or 2. You may correct
it in the thank you note and I'll get back to you.

Edwin

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