Triangle ABC, sinA = 4/5, sin 3/5, a = 12. Find c.

univerkov | December 7, 2020 | education

Let’s use the sine theorem:
a / sinA = c / sinC (follows) (c = x (unknown))
12 / (4/5) = x / (3/5) – we substitute the values into our formula and we can find x.
x = (12 * (3/5)) / (4/5) = 9
Answer: c = 9

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