Answer:
Step-by-step explanation:
Draw a Rigth triangle as the one attached, where "b" is the height in feet of the pole.
IFor this exercise you need to use the following Trigonometric Identity:
In this case, you can identify that:
Then, knowing these values, you can substitute them into , as below:
Finally, you must solve for "b" in order to find its value. You get that this is: