In triangle ABC, angle C is 90g, AC = 8, cosA = 4/9, find AB.
| March 10, 2021 | education
The cosine ∠A is the quotient of the division of the length of the AC leg, which is one of the sides of this angle, then
there is one adjacent to it, by the length of the hypotenuse AB rectangular Δ ABC.
Cosine ∠A = AC: AB = 4/9.
AC = 8: 4/9 = 18 units.
Answer: the length of the speaker is 18 units.
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