All Students Take Calculus

All Students Take Calculus is a mnemonic in mathematics that is used to help people memorize the sign values of all the trigonometric functions in the 2-dimensional Cartesian coordinate system. The letters ASTC signify which of the trigonometric functions are positive, in the order of the quadrants - starting in the top right quadrant, and moving counterclockwise.

Other variants

See also


  1. 1 2 3 4 "Sine, Cosine and Tangent in Four Quadrants". Archived from the original on 2015-01-18. Retrieved 2015-01-18.

External links

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