Question

In a right triangle ABC, tan(A) = 3/4. Find sin(A) and cos(A).

Answer 1

in right triangle , tan A =3/4
apply Pythagoras theorem ,
tanA=3/4=P/B
h^2=p^2+b^2
h^2=3^2+4^2
h^2=25
h=5
sinA=P/H=3/5
cosA=B/H
cosA=4/5