Posted by NeedHelpPlz on Friday, January 13, 2012 at 10:34pm.
I don't get how you get these answers:
cos180 degree = 1
sin45 degree = root(2)/2
cos(135) = root(2)/2
cot(60) = 1/root(3) or root(3)/3
What does cos or sin do to make the answer different?
please help

Math  Steve, Saturday, January 14, 2012 at 4:17am
Draw a triangle. In this case, it extends to the left on the xaxis, and the height is zero. Cos180° = x/h = 1/1 = 1
Draw a triangle. The legs are 1,1, hypotenuse=√2.
sin = y/h = 1/√2 = √2/2
cos 135 =  cos 45 = √2/2
Draw a triangle
cot 60 = x/y = 1/√3 = 1/√3 
Math  NeedHelpPlz, Saturday, January 14, 2012 at 8:04am
how do you know what is the side lengths for the cot60 angle?