In a right-angled triangle ABC, angle C = 90 degrees, tgA = 7 second, find AC if BC = 2.8.

univerkov | January 8, 2021 | education

We use the definition of the tangent of the angle and write it down relative to the angle A, which is the ratio of the opposite leg to the adjacent leg.
Tg A = BC / AC = 7/2 = 3.5
Let us express and find the AC leg.
AC = BC / tg A = 2.8 / 3.5 = 0.8.
Answer: the AC leg is 0.8.

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.