SOLUTION: If sin A>0 and tan A<0, then A is in what quadrant?

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Question 390579: If sin A>0 and tan A<0, then A is in what quadrant?
Found 2 solutions by stanbon, ewatrrr:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If sin A>0 and tan A<0, then A is in what quadrant?
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Since sin = y/r and r is always positive, y is + is sin is +.
So, sin>0 A must be in I or II.
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Since tan = y/x, if tan<0 and y is positive, x must be negative.
So, tan<0 A must be in II.
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Cheers,
Stan H.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,         

 sin A >0 and tan+A+=+sin+A%2FCos+A < 0, then cos A must be <0

A is in the II quadrant 

see below summary for (cosx,sinx) as a reference