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December 18, 2014

December 18, 2014

Posted by **Lucy** on Sunday, April 6, 2008 at 10:25am.

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**, Sunday, April 6, 2008 at 10:48amremember 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

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