All Students Take Calculus is a mnemonic for the sign of each trigonometric functions in each quadrant of the plane. The letters ASTC signify which of the trigonometric functions are positive, starting in the top right 1st quadrant and moving counterclockwise through quadrants 2 to 4.

All Students Take Calculus (ASTC) helps you to remember the sign values of the trignometric functions. Try out the concept on these example questions.

All Students Take Calculus - Practice Questions. Question 1 : Evaluate : tan 735 ° Solution : The given 735 ° is greater than 360 °. So, we have to divide 735 ° by 360 and take the remainder. When 735 ° is divided by 360, the remainder is 15 °. Therefore, 735 ° = 15 ° -----> tan 735 ° = tan 15 ° Hence, tan 735 ° is equal to tan 15 °.

Thankfully, the mnemonic device “All Students Take Calculus” provides an easy way to remember which trig ratios are positive in each quadrant. And the good news is, you don’t have to actually take any calculus courses to understand how to apply this mnemonic device!

All Students Take Calculus Explanation: In quadrant I, ALL trigonometric functions are positive; in quadrant II, only Sine is positive; in quadrant III, only Tangent is positive; and in quadrant IV, only Cosine is.

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.

This video uses the mnemonic device "All Students Take Calculus" to help you remember the Signs of each of the Trig Functions in Each Quadrant.#trigonometry ...