Given:
Consider the below figure attached with this question.
To find:
The measure of angle r by using the cosine rule.
Solution:
According to Law of Cosine,
Using the Law of Cosine, we get
On further simplification, we get
Therefore, the measure of angle r is 106.78 degrees.
Answer:
0.495
Explanation:
Given the expression:
Begin by simplifying the expression under the radical (square root) sign.
Using a calculator, we evaluate the radical:
Given:
The function in the form of set of points is
To find:
(a) The inverse of function s.
(b) whether the inverse of function s is a function?
Solution:
(a)
If a function is , then its inverse function is
We have,
So, inverse of this function is
Therefore, the inverse of function s is .
(b)
A set of point is a function if there exist unique output for each input.
In inverse of s, we have two output values y=4 and y=5 for single input x=3.
Therefore, the inverse of function s is not a function.