SOLUTION: What is the direction of the vector <9,-1>

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Question 724609: What is the direction of the vector <9,-1>
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
%0D%0Atheta=arctan%28y%2Fx%29=arctan%28-1%2F9%29%0D%0A
which is about -6.34 deg

:)