Chris Chappa

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“Complete” college algebra, trigonometry, contemporary math and Calculus II courses. Some more math. Some logic puzzles. Other random things.

Latest Videos

Number Sense Trick a x ab

Number Sense Trick a x ab

Chris Chappa

19 views·2 months ago

Trigonometry Video 7.2.8 - A Comment About Simplifying Square Roots

Trigonometry Video 7.2.8 - A Comment About Simplifying Square Roots

Chris Chappa

43 views·9 months ago

Trigonometry Video 7.2.7 - Another Formula for the Area of a Triangle (Part 2)

Trigonometry Video 7.2.7 - Another Formula for the Area of a Triangle (Part 2)

Chris Chappa

23 views·9 months ago

Trigonometry Video 7.2.6 - Another Formula for the Area of a Triangle (Part 1)

Trigonometry Video 7.2.6 - Another Formula for the Area of a Triangle (Part 1)

Chris Chappa

30 views·9 months ago

Trigonometry Video 7.2.5 - Using the Law of Cosines to Find Angles

Trigonometry Video 7.2.5 - Using the Law of Cosines to Find Angles

Chris Chappa

25 views·9 months ago

Trigonometry Video 7.2.4 - The Law of Cosines (Example 3)

Trigonometry Video 7.2.4 - The Law of Cosines (Example 3)

Chris Chappa

12 views·9 months ago

Trigonometry Video 7.2.3 - The Law of Cosines (Example 2)

Trigonometry Video 7.2.3 - The Law of Cosines (Example 2)

Chris Chappa

19 views·9 months ago

Trigonometry Video 7.2.2 - The Law of Cosines (Example 1)

Trigonometry Video 7.2.2 - The Law of Cosines (Example 1)

Chris Chappa

18 views·9 months ago

Trigonometry Video 7.2.1 - The Law of Sines versus SAS; The Law of Cosines

Trigonometry Video 7.2.1 - The Law of Sines versus SAS; The Law of Cosines

Chris Chappa

27 views·9 months ago

Trigonometry Video 7.1.11 - A New Triangle Area Formula

Trigonometry Video 7.1.11 - A New Triangle Area Formula

Chris Chappa

15 views·9 months ago

Trigonometry Video 7.1.10 - The Law of Sines Ambiguous Case (Example 3)

Trigonometry Video 7.1.10 - The Law of Sines Ambiguous Case (Example 3)

Chris Chappa

23 views·10 months ago

Trigonometry Video 7.1.9 - The Law of Sines Ambiguous Case (Example 2)

Trigonometry Video 7.1.9 - The Law of Sines Ambiguous Case (Example 2)

Chris Chappa

20 views·10 months ago

Trigonometry Video 7.1.8 - The Law of Sines Ambiguous Case (Example 1)

Trigonometry Video 7.1.8 - The Law of Sines Ambiguous Case (Example 1)

Chris Chappa

25 views·10 months ago

Trigonometry Video 7.1.7 - The Number of Solutions in the Law of Sines Ambiguous Case

Trigonometry Video 7.1.7 - The Number of Solutions in the Law of Sines Ambiguous Case

Chris Chappa

19 views·10 months ago

Trigonometry Video 7.1.6 - The Problem with Using the Law of Sines to Find an Angle

Trigonometry Video 7.1.6 - The Problem with Using the Law of Sines to Find an Angle

Chris Chappa

21 views·10 months ago

Trigonometry Video 7.1.5 - The Law of Sines (Example 2)

Trigonometry Video 7.1.5 - The Law of Sines (Example 2)

Chris Chappa

16 views·10 months ago

Trigonometry Video 7.1.4 - The Law of Sines (Example 1)

Trigonometry Video 7.1.4 - The Law of Sines (Example 1)

Chris Chappa

17 views·10 months ago

Trigonometry Video 7.1.3 - Deriving the Law of Sines

Trigonometry Video 7.1.3 - Deriving the Law of Sines

Chris Chappa

21 views·10 months ago

Trigonometry Video 7.1.2 - An Oblique Triangle Problem

Trigonometry Video 7.1.2 - An Oblique Triangle Problem

Chris Chappa

23 views·10 months ago

Trigonometry Video 7.1.1 - Congruency and Oblique Triangles

Trigonometry Video 7.1.1 - Congruency and Oblique Triangles

Chris Chappa

19 views·10 months ago

Trigonometry Video 5.4.14 - Using Half-Angle Identities - Part 4

Trigonometry Video 5.4.14 - Using Half-Angle Identities - Part 4

Chris Chappa

28 views·1 year ago

Trigonometry Video 5.4.13 - Using Half-Angle Identities - Part 3

Trigonometry Video 5.4.13 - Using Half-Angle Identities - Part 3

Chris Chappa

26 views·1 year ago

Trigonometry Video 5.4.11 - Using Half-Angle Identities - Part 1

Trigonometry Video 5.4.11 - Using Half-Angle Identities - Part 1

Chris Chappa

33 views·1 year ago

Trigonometry Video 5.4.10 - Half Angle-Identities

Trigonometry Video 5.4.10 - Half Angle-Identities

Chris Chappa

29 views·1 year ago

Trigonometry Video 5.4.12 - Using Half-Angle Identities - Part 2

Trigonometry Video 5.4.12 - Using Half-Angle Identities - Part 2

Chris Chappa

30 views·1 year ago

Trigonometry Video 5.4.9 - Power-Reducing Identities

Trigonometry Video 5.4.9 - Power-Reducing Identities

Chris Chappa

36 views·1 year ago

Trigonometry Video 5.4.8 - Using Sum-to-Product Identities

Trigonometry Video 5.4.8 - Using Sum-to-Product Identities

Chris Chappa

20 views·1 year ago

Trigonometry Video 5.4.7 - Sum-to-Product Identities

Trigonometry Video 5.4.7 - Sum-to-Product Identities

Chris Chappa

21 views·1 year ago

Trigonometry Video 5.4.6 - Using Product-to-Sum Identities

Trigonometry Video 5.4.6 - Using Product-to-Sum Identities

Chris Chappa

24 views·1 year ago

Trigonometry Video 5.4.5 - Product-to-Sum Identities

Trigonometry Video 5.4.5 - Product-to-Sum Identities

Chris Chappa

24 views·1 year ago

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