25.1.6 Angles of Elevation, Depression, and Bearing
25.1 Starting from the Right Triangle: Trig Ratios of Acute Angles
Point 6 of 6
25.1.6 Angles of Elevation, Depression, and Bearing
Core idea
Look up at a tower's top or down at a passing boat, and the angle between your line of sight and the horizon turns straight into real distances and heights.
Module goal. Carrying the function idea forward, we first build the link between an angle and the ratios of sides inside the most familiar shape — the right triangle — and learn to use it to measure real heights and distances.
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