Monday

September 22, 2014

September 22, 2014

Posted by **Jessica** on Monday, February 25, 2008 at 3:50am.

sin(ax)cos(bx)dx

Could someone tell me what they got for an answer so I can check it to see if my answer is right.

My answer:

-1/2sinasinbx^2-1/3acosaxcosbx^3+ integral 1/3 a^2cosbx^3sinax..I'm not sure hot to find the integral of the last part.

- math -
**drwls**, Monday, February 25, 2008 at 6:58amI thnink the "generalizing" formula they expect you to use is the identity:

sin(ax) cos(by) = (1/2)[sin((a+b)x) + sin ((a-b)x)]

Those two terms can be easily integrated separately and added.

**Answer this Question**

**Related Questions**

calc - find integral using table of integrals ) integral sin^4xdx this the ...

Integral - That's the same as the integral of sin^2 x dx. Use integration by ...

trig integration - s- integral endpoints are 0 and pi/2 i need to find the ...

Calculus - Hello Everyone, I need help with Calc II. 1. Integral from 0 to 1 of...

Calculus - MathMate Please help - ok, i tried to do what you told me but i cant ...

Integral Help - I need to find the integral of (sin x)/ cos^3 x I let u= cos x, ...

trig integration - i'm having trouble evaluating the integral at pi/2 and 0. i ...

Trig - Find cos(s+t) if cos s= -1/2 and sin t= 3/5, s and t are in quadrant II. ...

Calculus - F(x) = cos(x) • the integral from 2 to x² + 1 of e^(u² +5)du Find F'(...

algebra - Can someone please help me do this problem? That would be great! ...