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°. Part 1. Videos organized by Julie Harland at yourmathgal.com.<br />For more great math videos visit: www.youtube.com/user/videosbyjulieharland/videos . Aligned to Common Core State Standard: HSF-TF.3
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