To use the cosine rule to find the length of $AC$AC, which angle would need to be given?
$\angle CAB$∠CAB
$\angle BCA$∠BCA
$\angle ABC$∠ABC
Which of the following is true for the given triangle?
Which of the following is the correct equation to solve for missing side $a$a?
Find the length of $a$a using the cosine rule.
Round your answer to two decimal places.