# Solve this Trig Identity

#### jpac

cot^2a = cos^2a + cota*cosa

#### romsek

Math Team
assuming you mean

$\cot^2(a) = \cos^2(a)+\cot(a)\cos(a)$

this doesn't appear to be true

1 person

#### jpac

I also did not think so. I think it is a typo.

#### skipjack

Forum Staff
Were you supposed to be proving an identity or solving an equation?