Find the side BC of the right-angled triangle ABC (angle C = 90). If AB = 12cm; cos B = 0.8.

univerkov | December 5, 2020 | education

Cosine B = BC / AB (adjacent leg to the hypotenuse) = 0.8
AB = 12
We get
BC / 12 = 0.8
We find the sun from here
It will be equal to 9.6
Answer: BC = 9.6

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.