Law of sines is used for non right triangles and used only when you have an angle and an opposite leg value.
The formula is : sin(angle1)/opp. leg 1 = sin(angle2)/opp. leg 2
In triangle RST, angle S=126 degrees, s=12, t=7. Determine whether angle T exists. If so, find all possible measures of angle T.
sin126/12=sinT/7T=sin-1(7sin126/12)
T=28.159 degrees
Sin is related to Y and is positive in Q I and II.
-28.159+180=151.841
151.841 + 126 is greater than 180. And that equals 28.159.
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