Table of contents
- 0. Review of College Algebra(270)
- 1. Measuring Angles(327)
- 2. Trigonometric Functions on Right Triangles(196)
- 3. Unit Circle(214)
- 4. Graphing Trigonometric Functions(181)
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations(213)
- 6. Trigonometric Identities and More Equations(334)
- 7. Non-Right Triangles(117)
- 8. Vectors(151)
- 9. Polar Equations(81)
- 10. Parametric Equations(0)
- 11. Graphing Complex Numbers(91)
6. Trigonometric Identities and More Equations
Introduction to Trigonometric Identities
6. Trigonometric Identities and More Equations
Introduction to Trigonometric Identities: Study with Video Lessons, Practice Problems & Examples
119PRACTICE PROBLEM
Write the given trigonometric difference as a product and find the exact value, if possible.
cos 105° - cos 15°
Write the given trigonometric difference as a product and find the exact value, if possible.
cos 105° - cos 15°