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
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

- 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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