Question

integ_dx/(4-cosx)=?

Answer 1

Do you mean \( \huge\int \frac{dx}{4-\cos x} \) ?

Answer 2

yes.

Answer 3

help me please.it's important

Answer 4

HINT:Put \(t = \tan (x/2) \)

Answer 5

ok.thanks.

Answer 6

I like this approach: http://en.wikipedia.org/wiki/Weierstrass_substitution

Answer 7

It's the "The world's sneakiest substitution"-Michael Spivak