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4:45
jdmeducational.com
| jdmeducational
Use the memory device ASTC (all students take calculus) to label quadrants 1, 2, 3, & 4. A means all trig functions are positive and S, T, C stand for sine, tangent, & cosine. Also, cosine is the x-coordinate of a point on the unit circle, and sine is the y-coordinate of a point on the unit circle.
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