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OpenStudy (anonymous):
Help please, Find tan(s+t) given sin s= 1/4, s in quadrant II and sine t= -1/2, with t in quadrant IV. I figured out cos s= -sqrt(15)/4 and cos t= sqrt(3)/2 I'm iffy on my answer tho I got 4sqrt(3)+sqrt(15)/-11 is this correct?
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