In triangle KLM, KL = 2, LM = 3, KM = 4. Find cos K.
| June 22, 2021 | education
Let’s apply the cosine theorem for a triangle.
ML ^ 2 = KL ^ 2 + KM ^ 2 – 2 * KL * KM * CosK.
9 = 4 + 16 – 2 * 2 * 4 * CosK.
16 * CosK = 11.
CosK = 11/16.
Answer: The cosine of angle K is 11/16.
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.
