velox
Retired
If ur getting 90% for ur 4u tests, either they're shit easy or ur a genius.
velox said:If ur getting 90% for ur 4u tests, either they're shit easy or ur a genius.
If you know your expansions off the top of your head then doing the complex trick is pretty fast.hasterz said:lol ur funny man slide... but wouldnt expanding it out and equating the reals would have taken longer than the conventional method ?
that must have been some killer of an exam slide, if u get 87!!! Care to put it up??Slide Rule said:Meh. 87%.
i agree. I remember that when i did do 4u.KFunk said:If you know your expansions off the top of your head then doing the complex trick is pretty fast.
(cisθ )<sup>3</sup> = cos<sup>3</sup>θ + i3cos<sup>2</sup>θsinθ - 3cosθsin<sup>2</sup>θ -isin<sup>3</sup>θ
Equate your real and you have a pretty quick way to work it out.