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angle sum formulas for sine and cosine
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In this video I show how to use the angle sum formulas for sine and cosine. I go through 2 examples, involving radians and degrees, showing how to find the exact value of sine and cosine at specific angles. Some of the other concepts covered in this video include exact values of sine and cosine, trig values from special right triangles, converting from radians to degrees, converting from degrees to radians.
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