Learners explore applications of inverse functions. Topics investigated are angle of elevation, range, and right circular cones. The activity includes examples on uses of inverse functions in real situations with detailed solutions.

Offers instructions in how to use a clinometer, an instrument used by foresters for measuring angles in order to determine the height of a tree. The mathematics behind a clinometer is also explained.

Explains step by step, supported by pictures, how to use a clinometer to measure the height of a tall object.