Answer:
Step-by-step explanation:
You need the Law of Cosines for this, namely:
where x is the missing side.
and
so
x = 18.0 or just 18
Answer: 59/3k+14
A² = 9
substitute A = - 3 into A² , that is
A² = (- 3)² = - 3 × - 3 = 9
7.8
− 6 √ 2