Скачать или смотреть How to Use Double Angle Formulas

Learn how to work with the Double Angle Formulas for sine, cosine, and tangent in this free math video tutorial by Mario's Math Tutoring.

Timestamps:
00:00 Intro
0:11 Double angle formulas for sine, cosine, and tangent
1:01 Example 1 Given an angle find the trig ratios for double the angle
3:26 Example 2 Rewriting 8sinxcosx using double angles
4:24 Example 3 Rewriting 10cos^2(x) - 5
5:03 Example 4 Solving sin2x-sinx=0 using double angle formulas
6:33 Example 5 Solving cos2x+sinx=0

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