Answer:
68 degrees
Explanation:
we can consider 54 to be the radius of a circle.
sin of an angle is the distance of a point on a circle from the x-axis multiplied by the radius, as the standard sin function is defined for the standard circle with radius 1.
so, 50 is the sine of the angle in a circle with radius 54.
50 = sin(?)×54
sin(?) = 50/54 = 0.9259...
? = 67.81... degrees ≈ 68 degrees