Answer:

Step-by-step explanation:
The expression has been given as:

Required: Find 
Simplify the fraction

Take arc tan of both sides


Answer:
d. 5
Step-by-step explanation:
I just learned how to do it just for this so please lmk if it's right or not :)

<h3>Hope This Helps You </h3>
We need the following to be true
a+2b = -a
a+4 = 2a - 3b
Let's look at the first equation.
a + 2b = -a
Subtract both sides by a
2b = -2a
b = -a
Substitute b= -a into the second equation
a+4 = 2a + 3a
a + 4 = 5a
4a = 4
a = 1
Just take the negative of that and you get the value of b.
b = -1
Your solution is a=1 and b = -1.
Have an awesome day! :)