Recent content by s883

Homework Statement п/2 [SIZE="6"]∫dx/(2+sinx)2 0 Homework Equations The Attempt at a Solution п/2 [SIZE="6"]∫dx/(2 + sinx)2 = 0 п/2 ∫dx/(4 + 4sinx + (sinx)2) 0 substitude t=tg x/2 => x=2arctgx dx=2/(1+t2) dt sinx=2t/(1+t2) t=tgx/2 => 1 [SIZE="6"]∫(1/(4 + 4*(2t/(1+t2))...

thanks :)

what to use to solve them - especially the second one- I've tried substitution but got me nowhere

Homework Statement π/2 d x/ [SIZE="6"] ∫ (x2 - 2x cosx  + 1) 0 п [SIZE="6"]∫ sin x. ex^2dx -п Homework Equations The Attempt at a Solution

Homework Statement Could anyone explain me how to solve this? Homework Equations f(x) = 1/x2 + 4x + 9 + x4 , f’”’(-2) = The Attempt at a Solution