Question

find cos(a) as a decimal rounded the the nearest ten-thousandth. 1.875 .5333 .8824 .4706

Explanation:

Step1: Identify sides for cos(A)

In right triangle ABC, $\cos(A)=\frac{\text{adjacent to } A}{\text{hypotenuse}}$

Step2: Assign values

Adjacent to A is AB=8, hypotenuse AC=17

Step3: Calculate cos(A)

$\cos(A)=\frac{8}{17}\approx0.470588$

Step4: Round to nearest ten-thousandth

0.4706

Answer:

0.4706