Question

A right triangle has side lengths 5, 12, and 13 as shown below.Use these lengths to find cos A, tan A, and sinA.cosA=tanA=sinA=

Answer 1

r = 13

y = 5

x = 12

cos A = theta (based on the image), then:

$\cos \text{ A = }\frac{Adyacent\text{ of A}}{Hypothenus}\text{= }\frac{12}{13}\text{ }\approx0.92$

tan A:

$\tan \text{ A =}\frac{Opposite\text{ of A}}{\text{Adyacent of A}}\text{=}\frac{5}{12}\text{ }\approx\text{ 0}.42$

sin A:

$\sin \text{ A = }\frac{5}{13}\text{ }\approx0.38$