Trigonometry –

Circular Functions and The Unit Circle

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3.) Take the quiz

Oh. Ba. MATH. I mean, ObaMATH is back with an awesome lesson on Circular/Periodic Functions and an introduction to The Unit Circle! Starting in degrees (although it can be done in radians too), the Commander-in-TEACH walks us through the sin and cos of every major angle on The Unit Circle. Specifically, they're the angles from the 30-60-90 and 45-45-90 triangles. YAY MATH!

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