Law of sines

LAW OF SINES: The lengths of the sides of a triangle are proportional to the sines of their opposite angles:

Example: c = 5 cm, b = 7 cm, B= 30^o. Calculate C.

Exercise: Calculate a, knowing that b = 7.5 cm, A = 68^o and B = 87^o.

Solution: a = 6.96 cm