Final answer:
The angle of elevation of the sun is approximately 18.43°.
Step-by-step explanation:
In this problem, we are given that the shadow of a person standing in the sun is 3 times its height. To find the angle of elevation of the sun, we can use the concept of similar triangles.
Let's assume the person's height is h and the length of the shadow is s. According to the given information, we have s = 3h.
The angle of elevation of the sun can be determined using the tangent function. Tan(angle) = opposite/adjacent = h/s. Plugging in the values, tan(angle) = h/(3h) = 1/3.
Solving for angle, we get angle = arctan(1/3), which is approximately 18.43°.
Therefore, the correct angle of elevation of the sun is approximately 18.43°.