Question

What are the trigonometric functions and how are they used?

Accepted Answer

$$sin⁡(x) = \frac{opposite}{hypotenuse} \qquad cos⁡(x) = \frac{adjacent}{hypotenuse}$$   
    
$$tan⁡(x) = \frac{opposite}{adjacent} \qquad sec⁡(x) = \frac{1}{cos⁡(x)}$$   
    
$$csc⁡(x) = \frac{1}{sin⁡(x)} \qquad cot⁡(x) = \frac{1}{tan⁡(x)}$$   
    
The trig functions relate the side lengths to the angle measurements of a right triangle.

Flashcard 8 - Math Flashcard Set for the ACT

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