Solve this Trig Identity

Aug 2018
2
0
MN
cot^2a = cos^2a + cota*cosa
 

romsek

Math Team
Sep 2015
2,753
1,534
USA
assuming you mean

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

this doesn't appear to be true
 
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Aug 2018
2
0
MN
I also did not think so. I think it is a typo.
 

skipjack

Forum Staff
Dec 2006
21,301
2,377
Were you supposed to be proving an identity or solving an equation?