In triangle ABC, angle A is straight, AC = 12cm, cosABС = 0.6. Find the aircraft
| September 27, 2021 | education
We calculate the length of the BC through the cosine ∠АСВ.
The cosine ∠ACB is the quotient of dividing the length of the AC leg, which is one of the sides of this angle, that is, adjacent to it, by the length of the hypotenuse of the BC rectangular Δ ABC.
Cosine ∠ACB = AC: BC = 0.6.
BC = 12: 0.6 = 20 centimeters.
Answer: the length of the aircraft is 20 centimeters.
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