Can anyone help me with the integration of these 2 problems
1. cos x / ( x cos x - sin x )
2. ( sin ( x + a ) / sin ( x - a ) ) ^ 0.5
2006-08-26 04:55:26 · 4 answers · asked by Freak 1 in Science & Mathematics ➔ Mathematics
I hate integration and diffrentiation
2006-09-01 00:15:21 · answer #1 · answered by Ω Nookey™ 7 · 0⤊ 0⤋
Sorry, but I think both of these functions have nonelementary
antiderivatives. I played around with the second one
and basically reduced it to integrating
(1 + 2/(tan x -1) )^0.5
by setting a = pi/4.
Wolfram integrator could not find a formula for
this integral, so it's most likely nonelementary.
2006-09-01 21:02:37 · answer #2 · answered by steiner1745 7 · 0⤊ 0⤋
You could play around a bit using Wolfram's integrator:
http://integrals.wolfram.com/index.jsp
However, it doesn't find closed solutions for the two problems you gave.
2006-08-31 10:45:56 · answer #3 · answered by cordefr 7 · 0⤊ 0⤋
(x cosx - sinx) ' = cosx- cosx -xsinx = -xsinx
2006-08-26 12:30:38 · answer #4 · answered by fred 055 4 · 0⤊ 0⤋