sine rule

• a rule that can be used to find the side of an angle or the length of a side in a triangle. • for sides: a/sinA = b/sinB = c/sinC • for angles: sinA/a = sinB/a = sinC/c where a, b and c are the sides and A, B and C are the angles.

EXAMPLES:

sine calculator

http://www.rapidtables.com/calc/math/Sin_Calculator.htm