12olverabrenda wrote:(-sqrt(65)/9,-4/9) Find cot t
The cotangent is just (-sqrt(65)/9,-4/9)....i.e., (x coordinate value / y coordinate value) = (-sqrt(65)/,-4)
I'm assuming that you want to find the angle with x, y coordinates (-sqrt(65),-4)
OK.....we'll use the cotangent inverse for this
acot((-sqrt(65))/(-4))
Be careful here.....since x and y are negative, then this angle lies in the 3rd quadrant.....we must add this to 180 to get the correct angle...this gives us.....
acot((-sqrt(65))/(-4)) + 180
The answer, of course, is in degrees.....
+2353 
+129852 
