Posted by Anonymous on Friday, March 1, 2013 at 12:46pm.
draw an angle x in the 1st quadrant with sinx=3/5, and an angle y in the 2nd quadrant with cosy=12/13, then determine the exact value of tan(x+y).

Trig needs help  PsyDAG, Friday, March 1, 2013 at 1:05pm
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Urgent  Steve, Friday, March 1, 2013 at 5:31pm
in QI, cosx = 4/5
in QII, sinx = 5/13
now you can get tanx and tany, and use the formula for tan(x+y)
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