This open course provides the student with review of intermediate algebra, geometry, and trigonometry. It is designed for those want to be successful in an introductory college calculus course, but would like additional preparation.
PreCalculus by Dr. Sarah Eichhorn and Dr. Rachel Lehman is licensed under a Creative Commons AttributionNonCommercialShareAlike 3.0 License.
License: Creative Commons CCBYSA
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Required attribution: Eichhorn, Sarah; Lehman, Rachel Precalculus 1A/1B (UCI OpenCourseWare: University of California, Irvine), ocw.uci.edu/courses/math_1a1b_pr....html. [Access date]. License: Creative Commons AttributionShareAlike 4.0 United States License. (creativecommons.org/licenses/bysa/4.0/).
Lessons 

1) Intro to TrigonometryPreCalculus: Intro to Trigonometry Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D275 views

2) Coterminal AnglesPreCalculus: Coterminal Angles Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D285 views

3) Converting Between DegreesMinutesSeconds and DegreesPreCalculus: Converting Between DegreesMinutesSeconds and Degrees Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D315 views

4) Converting Between Degrees and RadiansPreCalculus: Converting Between Degrees and Radians Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D270 views

5) HalfAngle Identities, Part 1PreCalculus: HalfAngle Identities, Part 1 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D255 views

6) HalfAngle Identities, Part 2PreCalculus: HalfAngle Identities, Part 2 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D276 views

7) Compositions Involving Inverse Trigonometric Functions, Part 1PreCalculus: Compositions Involving Inverse Trigonometric Functions, Part 1 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D309 views

8) Compositions Involving Inverse Trigonometric Functions, Part 2PreCalculus: Compositions Involving Inverse Trigonometric Functions, Part 2 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D245 views

9) Inverse Trigonometric ValuesPreCalculus: Inverse Trigonometric Values Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D286 views

10) Law of Cosines Word ProblemPreCalculus: Law of Cosines Word Problem Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D263 views

11) Law of Sines and Cosines  ASA CasePreCalculus: Law of Sines and Cosines  ASA Case Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D300 views

12) Law of Sines and Cosines  SAS CasePreCalculus: Law of Sines and Cosines  SAS Case Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D236 views

13) Law of Sines and Cosines  SSA CasePreCalculus: Law of Sines and Cosines  SSA Case Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D276 views

14) Law of Sines and Cosines  SSS CasePreCalculus: Law of Sines and Cosines  SSS Case Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D274 views

15) Law of Sines Word ProblemPreCalculus: Law of Sines Word Problem Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D281 views

16) Reference AnglesPreCalculus: Reference Angles Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D246 views

17) Right Triangle TrigonometryPreCalculus: Right Triangle Trigonometry Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D280 views

18) Right Triangle Word ProblemsPreCalculus: Right Triangle Word Problems Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D247 views

19) Sketching an Angle in Standard PositionPreCalculus: Sketching an Angle in Standard Position Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D279 views

20) Solving Trigonometric Equations, Part 1PreCalculus: Solving Trigonometric Equations, Part 1 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D274 views

21) Solving Trigonometric Equations, Part 2PreCalculus: Solving Trigonometric Equations, Part 2 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D249 views

22) Solving Trigonometric Equations, Part 3PreCalculus: Solving Trigonometric Equations, Part 3 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D251 views

23) Sum and Difference Identities, Part 1PreCalculus: Sum and Difference Identities, Part 1 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D259 views

24) Sum and Difference Identities, Part 2PreCalculus: Sum and Difference Identities, Part 2 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D254 views

25) Sum and Difference Identities, Part 3PreCalculus: Sum and Difference Identities, Part 3 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D259 views

26) Solving Trigonometric Equations Quadratic in FormPreCalculus: Solving Trigonometric Equations Quadratic in Form Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D275 views

27) Trigonometric Values Given Information About the Angle, Part 1PreCalculus: Trigonometric Values Given Information About the Angle, Part 1 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D276 views

28) Trigonometric Values Given Information About the Angle, Part 2PreCalculus: Trigonometric Values Given Information About the Angle, Part 2 Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D311 views

29) Trigonometric Values of Special AnglesPreCalculus: Trigonometric Values of Special Angles Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D254 views

30) Trigonometric Values Given a Point on the Unit CirclePreCalculus: Trigonometric Values Given a Point on the Unit Circle Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D308 views

31) Verifying Trigonometric IdentitiesPreCalculus: Verifying Trigonometric Identities Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D289 views

32) Verifying Trigonometric Identities  Double Angle FormulasPreCalculus: Verifying Trigonometric Identities  Double Angle Formulas Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D249 views

33) Verifying Trigometric Identities  Sum &amp;amp; Difference FormulasPreCalculus: Verifying Trigometric Identities  Sum & Difference Formulas Instructor: Sarah Eichhorn, Ph.D and Rachel Lehman, Ph.D284 views

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