Option B is the odd one out
if you do not have a Unit Circle, this is a great time to get one, you can find many online just do a quick search for "unit circle".
Check the picture below.
If it’s 5 times you would multiply 8000 x 5 which is 40,000.
We will use the Sine Law:

b = 5.001
Answer:
D) 5.0
If you're just integrating a vector-valued function, you just integrate each component:


The first integral is trivial since
.
The second can be done by substituting
:

The third can be found by integrating by parts:


