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Chapter 03Trigonometry

0103.01Triangle Basics
0203.02Types of Triangles
0303.03Similar and Congruent Triangles
0403.04Pythagorean Theorem and Special Triangles
0503.05Sine, Cosine, and Tangent
0603.06The Unit Circle
0703.07Secant, Cosecant, and Cotangent
0803.08Trigonometric Identities
0903.09Solving Trigonometric Equations
1003.10Inverse Trigonometric Functions
1103.11The Law of Sines
1203.12The Law of Cosines

Chapter 03 · Trigonometry

0103.01Triangle Basics
0203.02Types of Triangles
0303.03Similar and Congruent Triangles
0403.04Pythagorean Theorem and Special Triangles
0503.05Sine, Cosine, and Tangent
0603.06The Unit Circle
0703.07Secant, Cosecant, and Cotangent
0803.08Trigonometric Identities
0903.09Solving Trigonometric Equations
1003.10Inverse Trigonometric Functions
1103.11The Law of Sines
1203.12The Law of Cosines

Topics / 03 Trigonometry

03.05

Sine, Cosine, and Tangent

SOH CAH TOA: the three side ratios of a right triangle, and how to use them to find missing sides.

About 16 minutes

You'll learn to

→Define sine, cosine and tangent in a right triangle
→Know the values at 30°, 45° and 60°
→Solve right-triangle problems, including angles of elevation

← 03.04 Pythagorean Theorem and Special Triangles 03.06 The Unit Circle →

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