Posted by Lucy on .
How do you find the cotangent of an angle?
My problem is: Find the exact value of cot(315degrees).
I don't know how to do this.
Any help would be great.

Algebra II 
Reiny,
remember the cotangent is 1/tangent
so find tan(315)
315 is the same as 45º
so tan(315) = tan 45 = 1 (from our 45,45 90 triangle)
so cot(315) = 1/1 = 1