Given a triangle CAB side AC = 12CM cosine of angle ACB = 0.6 find side BC
| May 20, 2021 | education
Knowing the AC side and the cosine of the ACB angle, we find the unknown BC side in the CAB triangle:
The cosine of an acute angle in a right-angled triangle is the ratio of the adjacent leg to the hypotenuse.
cos ACB = BC / AC;
BC = AC * cos ACB;
BC = 12 * 0.6 = 7.2 cm.
Answer: BC = 7.2 cm.
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