Answer:
6.00
Step-by-step explanation:
<u>Prove that:</u>

<u>Proof: </u>
We know that, by Law of Cosines,
<u>Taking</u><u> </u><u>LHS</u>
<em>Substituting</em> the value of <em>cos A, cos B and cos C,</em>



<em>On combining the fractions,</em>

<em>Regrouping the terms,</em>



LHS = RHS proved.
Answer: 0
Step-by-step explanation :0
The inverse of function f(x) = 3(x + 5)² - 4 is given by:

<h3>How to find the inverse of a function f(x)?</h3>
To find the inverse of a function y = f(x), we exchange x and y and then isolate y.
In this problem, the function is:
y = 3(x + 5)² - 4.
Exchanging x and y, we have that:
x = 3(y + 5)² - 4
Now we work to isolate y.



We have x ≤ –5, hence we take the negative value of the root, as follows:


Hence the inverse function is given by:

More can be learned about the inverse of a function at brainly.com/question/25897382
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Answer:
d is parallel to e
Step-by-step explanation:
Since b is parallel to e and d is perpendicular to b , then
d is perpendicular to e