Answer:
36.87°
Step-by-step explanation:
cos C = 4/5
arccos C = 36.87
Answer:

Step-by-step explanation:
Since we know the values of a, b, and c, we can substitute them into our expression and get the value.

A negative multiplied by a negative gets us a positive.

Adding a negative is the same as subtracting a positive.


Hope this helped!
Answer:
the answer is 3
Step-by-step explanation: