In the triangle ABC, it is known that AB = BC, and the height of AH divides the BC side into segments BH = 45
| February 12, 2021 | education
In the triangle ABC, it is known that AB = BC, and the height of AH divides the BC side into segments BH = 45 and CH = 30. Find cosB.
1. Calculate the length of the side of the aircraft:
BC = 45 + 30 = 75 units.
AB = BC = 75 units.
2. We calculate the cosine ∠В:
Cosine ∠B = BH / AB = 45/75 = 3/5 = 0.6.
Answer: cosine ∠B = 0.6.
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