March 31, 2015

Homework Help: Integral

Posted by drwls on Tuesday, February 20, 2007 at 5:07am.

That's the same as the integral of sin^2 x dx.
Use integration by parts.
Let sin x = u and sin x dx = dv
v = -cos x
du = cos x dx
The integral is u v - integral of v du
= -sinx cosx + integral of cos^2 dx
which can be rewritten
integral of sin^2 x = -sinx cos x + integral of (1 - sin^2) dx
2 * (integral of sin^2 x dx)
= - sin x cos x + integral of dx
integral of sin^2 dx = (-1/2) sin x cos x + x/2

integral of (1-cos^2 x) dx

might be easy but i need to make sure

Answer this Question

First Name:
School Subject:

Related Questions

trig integration - i'm having trouble evaluating the integral at pi/2 and 0. i ...
trig integration - s- integral endpoints are 0 and pi/2 i need to find the ...
TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
algebra - Can someone please help me do this problem? That would be great! ...
tigonometry - expres the following as sums and differences of sines or cosines ...
Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...
Calculus - Evaluate the integral. S= integral sign I= absolute value S ((cos x...
trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
Calculus AP - Evaluate the integral interval from [0 to pi] t sin(3t)dt Use ...
math - I'm trying to find the convolution f*g where f(t)=g(t)=sin(t). I set up ...