View Full Version : Integral
lostinhere
Jun23-05, 03:35 PM
I'm having trouble with this. Can anyone help me integrate
sqrt(2+2sin(x))
??
Thanks
The Bob
Jun23-05, 04:06 PM
sqrt(2+2sin(x))
Can you out it into a different form first?
The Bob (2004 ©)
lostinhere
Jun23-05, 04:17 PM
Other than
sqrt(2)*sqrt(1+sin(x))
I'm stuck
dextercioby
Jun23-05, 05:09 PM
HINT:Make the substitution
\tan\frac{x}{2}=t
Daniel.
lostinhere
Jun23-05, 05:40 PM
Can you be more specific please?
dextercioby
Jun23-05, 05:58 PM
Transform the integral (make a change of variable).
\sqrt{2}\int \sqrt{1+\sin x} \ dx
x=2\arctan t
Daniel.
steven187
Jun23-05, 06:26 PM
hello there
sqrt[1+sinx]=[(cosx)^2]/[sqrt[1-sinx]]
see what you could do with that if it helps
steven
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