Fancy Trig Equations

To solve for an unknown angle we will use all sorts of clever tricks, employing the trig formulas and identities in weird and wonderful ways!

Proof of the Trig Sum and Difference Formulas

Proof of the sum and difference formulas for sine, cosine and tangent

Trig Substitution & Identities

Using the trig identities for substituting a Pythagorean looking expression.

Some more Trig Word Problems (4.8, 4.R)

Here we use the trigonometry from our first Trig Chapter (4 in our textbook) to review how sine, cosine and tangent are used to solve word problems

Inverse Trig Functions and Trig Word Problems

Use the inverse trig functions to find unknown angles and use everything you know about sine cosine and tangent to solve word problems

Graphing Trig Functions (4.1-4.6)

Here we have basic angles in radians, and graphing the trig functions of these angles. These functions, with their ability to transform waves with different periods and amplitudes, can be used to mathematically express all sorts of waves we find in real life. These ideas are from Sections 4.1 to 4.6 of our Precalculus book by Larsen.

Radians and Unit Circle Trig Quiz Answers

Quiz answers on radian angles, unit circle and right triangle trig (Sections 4.1-4.4)

Answers to a first Trig Test

Answers to a first Test in Trig: Graphing Sine Cosine and other trig facts and word problems.

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