Question

CosB=1/2 AB=5 C=90° Найти:BC​

Answer 1

Ответ:

ВС=АВсоsB

BC=5*1/2=2,5

Answer 2

Based on the given information, we have cos(B) = 1/2 and AB = 5. We need to find BC.

In a right triangle ABC, the cosine of an angle is defined as the ratio of the adjacent side to the hypotenuse. In this case, cos(B) = BC/AB.

Substituting the given values, we have:

1/2 = BC/5

To find BC, we can cross-multiply:

2 * BC = 5

Dividing both sides by 2:

BC = 5/2

Therefore, BC is equal to 2.5 units.