Name:
Anonymous
2009-11-05 20:45
do you find the integral of 1 / ( (sin(x)*(5+4*cos^2(x)) ) by substituting cos(x)?
Name:
Anonymous
2009-11-05 20:52
I mean 1 / ( sin(x)*(5+4*cos^2(x)) )
Fuck parentheses.
Name:
Anonymous
2009-11-06 4:14
cos² x = 1 - sin² x maybe.
Name:
Anonymous
2009-11-07 7:48
OP here, I solved it ages ago.
Integral of (1 / (sin(x)(5+4cos^2(x)))) dx
= Integral of (sin(x) / ((1-cos^2(x))(5+4cos^2(x)))) dx
Let u = cos(x) -> du/dx = -sin(x)
Our integral is now:
Integral of (-1/((1-u^2)(5+4u^2))) du
etc