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= 30o. Calculate C.



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




Solution: a = 6.96 cm  


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