Question

question 4 of 10 according to this diagram, what is cos 23°? a. $\frac{12}{5}$ b. $\frac{13}{5}$ c. $\frac{13}{12}$ d. $\frac{12}{13}$ e. $\frac{5}{13}$ f. $\frac{5}{12}$

Explanation:

Step1: Identify adjacent side and hypotenuse for 23°

Adjacent side = 12, hypotenuse = 13

Step2: Apply cosine definition

$\cos 23^\circ = \frac{\text{adjacent}}{\text{hypotenuse}} = \frac{12}{13}$

Answer:

D. $\frac{12}{13}$