Trigonometry Inequality Please Helpp!!!!!!!!

Iknownothing17

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Joined
Nov 1, 2007
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6
Ok the question is if tan A= -2/3 and 90 degrees < A < 180 degrees, find sinA


I got -2 sqrt 13/ 13 is that right?? Am I on the right track??
 
Draw a picture. According to mine, your angle is in the second quadrant.
 
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