Saturday

February 28, 2015

February 28, 2015

Posted by **Tom** on Saturday, January 20, 2007 at 2:06pm.

integrate (e^x)(sin3x)

I get the answer(e^x)(cos3x-3sin3x) +C

My book gets the answer

(1/10)(e^x)(sin3x-3cos3x)+C

Can any explain which answer is right and why

Integral of e^(1+3i)x =

e^(1+3i)x /(1+3i) + c

Multiplying numerator and denominator by (1-3i) gives:

(1-3i)e^(1+3i)x/10

If you take the imaginary part you get the answer given in your book.

I am such an idiot for some reason I differentiated not integrated. Thanks so much

**Answer this Question**

**Related Questions**

Maths - given (e^x)sin3x = Im((e^x)(e^i3x)) Integrate (e^x)sin3x.dx You can just...

Calculus - In the interval (0 is less than or equal to x which is less than or ...

Calculus part 3 so sorry - y = e^2xsin3x Find the derivative. So I used the ...

maths - prove that cos3x+sin3x/cos x-sin x=1+2sin2x

math(advanced algebra&trigonometry) - the expression cos4x cos3x + sin4x sin3x ...

precalc - (cos3x)^4+(sin3x)^4=cos(g(x)) find g(x)

precalc - (cos3x)^4+(sin3x)^4=cos(g(x)) find g(x)

precalc - (cos3x)^4+(sin3x)^4=cos(g(x)) find g(x)

Trig - cos4x*cos3x + sin4x*sin3x

pre calc - (cos3x)^2+(sin3x)^2=cos(f(x)) find f(x)