Given a right-angled triangle ABC, angle C of a straight line, it is known that AB = 20 BC = 10. find cos B.
| September 26, 2021 | education
1. Based on the condition of the problem, we are given all the values we need AB = 20 and BC = 10 to find cos B.
2. Recall and write down the formula cos B:
cos B = BC / AB.
3. Substitute the values into the formula and calculate cos B:
cos B = 10/20;
cos B = 0.5.
Answer: cos B = 0.5.
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.
