Ms. Allison Wells

**Graphs**

The following graph pages are available for download.

**Memorizing Unit Circle**

The following links are available on school wifi and are safe for viewing.

Left Hand Trick (Youtube)

Left Hand Trick (Written out)

Increasing/Decreasing values (Youtube)

Explanation of Unit Circle: not a quick fix, but goes over the points like we did in class (Youtube)

Shorter Explanation of Unit Circle (Youtube)

**Trig Identities**

Even/Odd Properties of Trig Functions

The Magic Hexagon (Helps to remember all trig identities)

**Graphing Trig Functions (more links coming soon)**

Khan Academy explanation for cos/sin

Desmos Interactive Graph for Sin/Cos

**Sum, Difference, and Double Angle Formulas**

Proof of Sum/Difference Formulas - How the formulas are derived.

Youtube Video 1 - He gives some tips on remembering the patterns in the formulas.

Youtube Video 2 - She gives a chant to help remember sin and cos formulas.

Link 1 - This person created a story line to help remember the patterns in the formulas.

Triangle Geogebra - Website that allows you to set side lengths and angles in triangles.

Bearing Problem - I made a video explaining a bearing problem and addressing some issues that may come up.

Bearing Problem #25 - Explaining what to do with multiple bearings on one object.

Triangle Cases - Explaining when we may have none, one, or two triangles and why.

Using Law of Cosines - Explanation of how to use Law of Cosines to test how many triangles in ambiguous case

**Final Exam Resources**

Terminal Point and Side, Explanation of Radians

What is f(a+h)? - Explaining problems 6-8 on Review

Conjugate Pairs of Zeros - Explaining problems 31-34 on Review

Half Angle Formulas - Good review for those who have not taken or are retaking Test 9.

How to check your work when you've used a formula to solve. This is a link to the end of the previous video.

**Vectors**

Vector Word Problems - HW #2 Problem 10

Explanation of phrases seen in Vector Word Problems - also help setting up problems based on descriptions.

**De Moivre's Theorem**

Power of n - Test 1 and 2 Review Problem 42

**Test 3 Review**

Finding parametric equations from a rectangular equation

Elliptical word problem example

Projectile motion word problem example

**Test 6 & 7 Review**

Khan Academy Video showing long division of polynomials

Website with Animation showing long division of polynomials

Wonderful video explaining graphing rational functions.

**Test 8 & 9 Review**

How to write a series in sigma notation Khan Academy video