Posted by Paige on Friday, February 18, 2011 at 1:43pm.
find (s+t) given that cos s=1/3 with s in quad I and sin T=1/2 with t in quad IV

Trig  Reiny, Friday, February 18, 2011 at 4:59pm
I have a feeling that you want exact values for
sin(x+t) or cos(s+t)
the way it stands, just use your calculator to find each of the angles, then add them up.

Trig  Paige, Friday, February 18, 2011 at 9:27pm
No it is to find the exact value of the expression using the provided information. Find Tan (S+T) given that cos s=1/3 with s in quad I and sin T= 1/2 with T in quad IV
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