# Trigonometric Functions

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Examples, videos, worksheets, games, and activities to help students learn the trigonometric functions: sine, cosine, tangent, secant, cosecant and cotangent.

The Trigonometric Functions: Example 1
This video defines all of the trigonometric functions in terms of a right triangle: sin, cos, tan, sec, csc and cot. It also gives a few examples.
Example:
For the given triangle, find the sine, cosine, and tangent of angle O.
The Trigonometric Functions: Example 2
Just a few more examples of finding values for the trig functions given a right triangle.
Examples:
1. a) What is the value of cot θ? b) What is the value of tan θ? 2. For the given triangle, find the secant and cosecant of angle P.

Finding an Angle Given the Value of a Trigonometric Function - Example 1.
Deduce the angle associated with a given trigonometric value.
Example:
What is the measure of θ if it represents an acute angle with cos θ = √3/2?
Finding an Angle Given the Value of a Trigonometric Function - Example 2.
Deduce the angle associated with a given trigonometric value.
Example:
Suppose that tan θ = 1. Given that θ is an acute angle in a right angle, what is the measure?

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