Why? WHY?
I figured out today, completely by accident, that sqrt 50 = 10 sin 45. WHY??
Also, does anyone else on here just love DDR?
Rotovia-
09-08-2005, 07:42
I figured out today, completely by accident, that sqrt 50 = 10 sin 45. WHY??
Also, does anyone else on here just love DDR?
IS EVERYONE ON THIS FORUM STONED TODAY?!
I figured out today, completely by accident, that sqrt 50 = 10 sin 45. WHY??
Also, does anyone else on here just love DDR?Who doesn't like DDR???
IS EVERYONE ON THIS FORUM STONED TODAY?!Yes.
The Arch Wobbly
09-08-2005, 07:52
IS EVERYONE ON THIS FORUM STONED TODAY?!
You make it sound like there's a time when they aren't stoned.
Murderous maniacs
09-08-2005, 07:55
I figured out today, completely by accident, that sqrt 50 = 10 sin 45. WHY??
Also, does anyone else on here just love DDR?
sin 45 = (sqrt 2)/2
it's called trigonometry
Tannenmille
09-08-2005, 08:13
Dance Dance Revolution.
Ethical Lapse
09-08-2005, 08:17
I thought he meant Deutsche Democratische Rebuplik! :(
Harlesburg
09-08-2005, 08:42
IS DDR related to FDR?
Do what to who for how many cookies?
Fortopia the Second
09-08-2005, 10:35
Give me a couple of years, I might understand it
Optima Justitia
09-08-2005, 17:57
• DDR is really fun, even though I'm only any good at the first two levels. Recently when I was in Texas I played the computer version and got *much* better at playing the levels when the arrows appear consecutively, like a stream of quarter notes.
• Math is okay and I'm good at it but I don't go proving geometrical and algebraic theorems in my spare time the way you do :-P
Tactical Grace
09-08-2005, 18:21
Let me take you through it...
Obviously, sqrt(50) = sqrt(25*2) = sqrt(25)sqrt(2) = 5*sqrt(2)
Now, sin(45) = [sqrt(2) / 2]
Why this, well, picture a right-angle where the other two angles are 45 degrees each. If the two sides making the right-angle are of unit length, the hypothenuse will have length sqrt(2), by Pythagoras' Theorem. It follows that the sine of either of the 45-degree angles is [1 / sqrt(2)].
People generally don't like having that sort of thing in the denominator, so multiply it and the numerator by sqrt(2) (notice that this does not change the actual value, as we are just multiplying by 1). You get... [sqrt(2) / 2]
Compare... 5*sqrt(2) and [sqrt(2) / 2]...you just have to multiply the result of the sine operation we just performed by 10, to get sqrt(50).
FUN! :D
OK, I just took all the fun out of the thread by regurgitating Year 7 maths. :p
But it is amazing how often trig operations collapse down to something compact, and believe me, this sort of thing is one hell of a life-saver when you're doing three-phase load flow calculations, with complex numbers and everything.
Jah Bootie
09-08-2005, 18:29
Whoever started this thread couldn't be any more Asian if they tried.
maybe you should ask for 'what you dont like in the DDR?'
there are some things.... :rolleyes: ..... :headbang:
but what is the link between DeutscheDemokratischeRepublik and mathematics ?
or is it a RolePlay or game ?
:)
Cogitation
09-08-2005, 18:50
Dance Dance Revolution and mathematics. Both very easy. :)
But it is amazing how often trig operations collapse down to something compact, and believe me, this sort of thing is one hell of a life-saver when you're doing three-phase load flow calculations, with complex numbers and everything.I may be smart, but I have my limits. Fluid mechanics is pushing it.
--The Democratic States of Cogitation