Question

integral sechx dx

Answer 1

coshx+C

Answer 2

no i dont think it is coshx

Answer 3

it should be 2tanh^-1 (tanh(x/2))+C

Answer 4

ok @dcrose lemme try

Answer 5

that wasn't right

Answer 6

\[\text{sech}(x)=\frac{2}{e^{x}+e^{-x}}=2\frac{e^x}{(e^{x})^2+1}\]

letting \(u=e^x\)

gives and antiderivative of

\[2\tan^{-1}(e^x)+c\]

Answer 7

wow! thank you very much