# Establish the identity. ln |cot u| = ln |cos u| - ln |sin u| ____________________ Could someone please explain to me how to solve this?

##### 1 Answer

Aug 3, 2018

Simply use

#ln|cotu| = ln|cosu/sinu|#

Now the logarithms cancel out

#cotu = cosu/sinu#

#1/tanu = cosu/sinu#

#1/(sinu/cosu) = cosu/sinu#

#cosu/sinu = cosu/sinu#

Hopefully this helps!