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.

Respuesta :

sinA=BC/AB=28/35=4/5; cosA=AC/AB=21/35=3/5.
sin A = opposite / hypotenuse = BC / AB = 28/35  = 4/5

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