Flashcard 8 - Math Flashcard Set for the ACT

\[sin⁡(x) = \frac{opposite}{hypotenuse} \qquad cos⁡(x) = \frac{adjacent}{hypotenuse}\] \[tan⁡(x) = \frac{opposite}{adjacent} \qquad sec⁡(x) = \frac{1}{cos⁡(x)}\] \[csc⁡(x) = \frac{1}{sin⁡(x)} \qquad cot⁡(x) = \frac{1}{tan⁡(x)}\]

The trig functions relate the side lengths to the angle measurements of a right triangle.

Use the acronym SOHCAHTOA to remember. Opposite refers to the side length opposite the angle; adjacent refers to the side length next to the angle; hypotenuse refers to the longest side of a right triangle.