Question #11800167

# Help with finding direction angle of vector help please?

**I am asked to find the direction angle of vector u = <3,-4>
So I already have tan(x) = -4/3
How do I solve this??? How do I input this in a calc? I know if it's tan(x) = 5/-1
Then it's tan^-1(-5)
**

TELL US , if you have any answer