If sin(x)=-4/5 and (x) is in Quadrant III, find tan(x/2)

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Originally Posted by derek1008 If sin(x)=-4/5 and (x) is in Quadrant III, find tan(x/2) if is a quad III angle ... (1) by sketching a reference triangle in quad III, you can calculate the value of . (2) ... which says is a quad II angle. Therefore, . now use your half angle identity for tangent.

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