Pre-Calculus 10 · Geometry
Right Triangle Trigonometry
Trigonometry begins with a simple observation: in similar right triangles, the ratios of corresponding sides are always equal. That constant ratio is what we call sine, cosine, and tangent. SOH-CAH-TOA is a mnemonic for three ratios that unlock the geometry of every right triangle — a tool engineers, surveyors, and navigators rely on daily.
WHAT STUDENTS WILL LEARN
✓Define sine, cosine, and tangent as ratios of sides in a right triangle (SOH-CAH-TOA)
✓Use trigonometric ratios to find missing sides and angles
✓Solve right triangle problems in two and three dimensions
✓Apply trigonometry to real-world problems: angles of elevation and depression
BUILDS ON
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