# Trig functions special angles 2

Taught by YourMathGal
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Lesson Summary:

In this lesson, the teacher shows an easy way to find the trig functions of special angles and angles at multiples of 90 degrees. By using a right triangle and labeling the sides, the teacher demonstrates how to find the sine, cosine, tangent, cotangent, csc, and sec of each angle. Through seven examples, the teacher explains how to use this method, emphasizing that it is just one way of doing it and can be a helpful tool in finding exact trig function values.

Lesson Description:

Easy way to use right triangle and label sides to find sin, cos, tan, cot, csc, and sec of the special angles, and of angles at multiples of 90 degrees. Part 2.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

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• #### Staff Review

• Currently 4.0/5 Stars.
This lesson continues from where the previous lesson left off but includes the trig functions secant (sec), cosecant (csc), and cotangent (cot). The 30, 60, 90 and 45, 45, 90 special triangles are used to easily find the values of trig functions at common angle measures. The answer to the final problem should be -(square root 3)/2, NOT -1/2.