Given:
There are given that the triangle ABC.
Where,
Step-by-step explanation:
According to the question:
We need to find the value for parts A, B, and C.
Then,
For part A:
To find the value of measure angle A, we will use the cosine rule:
So,
From the cosine rule:
Then,
Put the value of a, b, and c into the given formula:
So,