- #1
banutraul
Homework Statement
You have to calculated the Laplace transformation for 1/ cos(t)
Homework Equations
That's all
The Attempt at a Solution
i tryed whit some trigonometric formulas but i don't get anywhere : 1/cos(t) = cos(t) / (1- sin ^2 (t)) or 1/cos(t) = cos(t) + sin(t) x tg(t) or 1/cos(t)= (tg(t))' cos(t) ...