Answers are like this: 1)Cos C 2)Cos B 3)Cos A 4)a 5)b 6)c all of them are different type of writing cosines law , just this.
Answer:
r=-6
r=-1
Step-by-step explanation:

<span>x equals four plus or minus the square root of negative four squared minus four times three times eleven, all divided by two times three</span>
Answer: Second Option
and 
Step-by-step explanation:
If we have a function f(x) and its inverse function 
Then by definition:

Notice that the inverse of the function
is 
then:
If
and 
Then:



The answer is the second option