Solving Right Triangles

Question

Let angle D be an acute angle such that sin D = 0.75. Use a calculator to approximate the measure of  angle D to the nearest tenth of a degree.

m angle D =

Answer 1

We know --- Sin D =0.75

So, D=arcsin (0.75)

Using arcsin calculator, we get D= 48.5904 & 131.41 degree

Becase D is acute angle, So D=48.5904=48.6 (nearest tenth).