Question

Find the value of x.
Round to the nearest tenth.
Х
120°
10
x = [?]

Answer 1

X is 11.8

Explanation:

You already have the formula so just put in the values and rearrange to get the answer. c is what you are looking for so that is x. a can be 3 and b is 10. CosC is Cos(120) the rest work it out on calculator.