who can help me

[Ro0omio]

please anyone know how to solve this please do

cot(∏/2-u)=tanu
I try solveing it but I can't , it will be huge help if someone help me

[meMi angel]

cot(∏/2-u)=tanu

I can but sorry because i can't express it in english


Cos(∏/2-u)/Sin(∏/2-u) = Sin u/ Cos u= Tan u

[Ro0omio]

thanks
I have other question
cos(x+h)-cos x /h = cos x (cosh-1/h)-sinx(sinh/h)
sorry if i tired you ( about english Iam not good too)

[meMi angel]

cos(x+h)-cos x /h = cos x (cosh-1/h)-sinx(sinh/h)

Cosx cosh-Sinx Sinh-Cosx/h=
Cosx(Cosh-1)-Sinx Sinh/h
=Cosx(cosh-1/h)-sinx(sinh/h) ( the other side )

hope that i help

[Ro0omio]

huge thanks for you

[meMi angel]

any time ( there is no thanks between friends ) >> any equation you want solve it just writ it here .. & any question in physics face you tel me about ( if i know i will solve it )