In right triangle ABC with angle B = 90˚ , we have 2sinA = 3cosA . What is sinA?
Solve for A:
2 sin(A) = 3 cos(A)
Divide both sides by cos(A):
2 tan(A) = 3
Divide both sides by 2:
tan(A) = 3/2
Take the inverse tangent of both sides:
Arctan(3/2) =A =56.31 degrees.
Sin(A) = sin(56.31) =0.832