ANSWER
Step-by-step explanation
(a) To find the value of a, we have to apply trigonometric ratios, SOHCAHTOA, for tangent for right triangles:
Therefore, we have that:
(b) To find the value of b, we have to apply trigonometric ratios, SOHCAHTOA, for sine for right triangles:
Therefore, we have that:
(c) To find the measure of A, apply the total angle in a triangle.
The sum of angles in a triangle is 180 degrees. This implies that: