Question

Find the exact values of sin A and cos A. Write fractions in lowest terms. A right triangle ABC is shown. Leg AC has length 21, leg BC has length 28, and hypotenuse AB has length 35.

Answer 1

sin A = opposite / hypotenuse = BC / AB = 28/35 = 4/5

cos A = adjacent /hypotenuse = AC/AB = 21 / 35 = 3/5

Answer 2

sinA=BC/AB=28/35=4/5; cosA=AC/AB=21/35=3/5.