velox
Retired
If ur getting 90% for ur 4u tests, either they're shit easy or ur a genius.
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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.