Refer back to the concept of arc tan, or inverse tan, to understand the concept of inverse sine and inverse cosine. Watch (Tangent)
Reminder: the angle of elevation and angle of depression have the same measure.
Use the following problems to apply the inverse tangent, sine, and cosine functions:
1) Find the angle of elevation to the airplane from the ground:
2) Find the measure of angle A. Which ratio did you use and why?
3) Find the measure of angle A and the measure of angle F.