Cos3x...
im not sure if i did it right i thought it was too long.
i did
cos(2x+x)
cos2x*cosx-sin2x*sinx
(cosx*cosx-sinx*sinx)*cosx-(sinx*cosx+cosx*sinx)*sinx
(cosx^2-sinx^2)*cosx-2(sinx*cosx)*sinx
(cosx^3-sinx^2*cosx)-2(sinx^2*cosx*sinx)
....ido alot more but does it look like i started right?
im pretty sure theres a faster way.
i did
cos(2x+x)
cos2x*cosx-sin2x*sinx
(cosx*cosx-sinx*sinx)*cosx-(sinx*cosx+cosx*sinx)*sinx
(cosx^2-sinx^2)*cosx-2(sinx*cosx)*sinx
(cosx^3-sinx^2*cosx)-2(sinx^2*cosx*sinx)
....ido alot more but does it look like i started right?
im pretty sure theres a faster way.
posted by ivan haros at 10:05 PM
3 Comments:
Yeah, that problem was a pain, but I couldn't find any other way to do it. This method gets especially confusing for things like cos 13x. There must be a better way to do this.
i really need help with this blogging thing
i can comment but i cant get my name to appear in the contributors list. and this doesnt show up under my blogs. how do i fix this. i have a gmail account.
Post a Comment
<< Home