Renegade343 Posted August 26, 2014 Share Posted August 26, 2014 I was wondering if anyone has his/her favourite mathematical formula from his/her time of doing math, and would like to share it? Personally, I like the binomial distribution formula. Easy to use, and a heck of a lot of fun to play with. Link to comment Share on other sites More sharing options...
Niryco Posted August 26, 2014 Share Posted August 26, 2014 I was wondering if anyone has his/her favourite mathematical formula from his/her time of doing math, and would like to share it? Personally, I like the binomial distribution formula. Easy to use, and a heck of a lot of fun to play with. My most favourite formula? Well that is tough..... How about TOA, CAH and SOH along with all the triangle formulas? Also binomial distribution is fun too =D Link to comment Share on other sites More sharing options...
Letter13 Posted August 26, 2014 Share Posted August 26, 2014 Third-order nonlinear partial differential equations. I lied. It's Pythagoras's theorem. Differential equations, especially third order and up, are positively nightmarish especially when solving by hand. Liek this if you cry everytim you have to solve a differential equation. Link to comment Share on other sites More sharing options...
StinkyPygmy Posted August 26, 2014 Share Posted August 26, 2014 (edited) Man off topic is getting wild tonight! (today for some) Don't have one. Never was good at maths. terrible at it. Although graphs and such was about as fun as it could get for me. Hmmm dem exponential curves. If ya know what I mean. *wiggles eyebrows at a comically absurd speed* I'll see myself out. Edited August 26, 2014 by StinkyPygmy Link to comment Share on other sites More sharing options...
Imaru Posted August 26, 2014 Share Posted August 26, 2014 Just for the amount of time it has saved me I have to go with the Quadratic Formula. I wrote a program in my calculator to solve it for me given the constants in an equation and it has saved me from so much factoring. I hate factoring. Link to comment Share on other sites More sharing options...
StinkyPygmy Posted August 26, 2014 Share Posted August 26, 2014 Third-order nonlinear partial differential equations. I lied. It's Pythagoras's theorem. Differential equations, especially third order and up, are positively nightmarish especially when solving by hand. Pythagoras theorm eh? I can actually manage that! I am not a numbers man. Link to comment Share on other sites More sharing options...
Renegade343 Posted August 26, 2014 Author Share Posted August 26, 2014 Third-order nonlinear partial differential equations. I lied. It's Pythagoras's theorem. Differential equations, especially third order and up, are positively nightmarish especially when solving by hand. Really? Differential equations are really easy to play with though. Link to comment Share on other sites More sharing options...
noveltyhero Posted August 26, 2014 Share Posted August 26, 2014 Mine is the simpler ones I think The more complex ones are fun and such but this one just appeals to me ^^ pi*r^2 Yeah I know, primary school stuff but hey ho XD Link to comment Share on other sites More sharing options...
tveeggad Posted August 26, 2014 Share Posted August 26, 2014 (edited) Uh.. the one where you take this number.. and this other number.. and then.. uh.. Edited August 26, 2014 by ConcretePie Link to comment Share on other sites More sharing options...
Rakshal Posted August 26, 2014 Share Posted August 26, 2014 Crap, I forgot most of the math formulas I learned. XD I guess Pythagoras's Theorem. :P Link to comment Share on other sites More sharing options...
Somedude1000 Posted August 26, 2014 Share Posted August 26, 2014 The equation of time I need more of it Link to comment Share on other sites More sharing options...
StinkyPygmy Posted August 26, 2014 Share Posted August 26, 2014 Mine is the simpler ones I think The more complex ones are fun and such but this one just appeals to me ^^ pi*r^2 Yeah I know, primary school stuff but hey ho XD Primary school stuff he says... Uh.. the one where you take this number.. and this other number.. and then.. uh.. OH! That one is my favorite too! Link to comment Share on other sites More sharing options...
Niryco Posted August 26, 2014 Share Posted August 26, 2014 Third-order nonlinear partial differential equations. I lied. It's Pythagoras's theorem. Differential equations, especially third order and up, are positively nightmarish especially when solving by hand. Liek this if you cry everytim you have to solve a differential equation. Differentiation is ok, i like doing implicit differentiation but i hate to prove differential equations using limits, those are things i could never get to be honest. Link to comment Share on other sites More sharing options...
Renegade343 Posted August 26, 2014 Author Share Posted August 26, 2014 Differentiation is ok, i like doing implicit differentiation but i hate to prove differential equations using limits, those are things i could never get to be honest. Show me the questions right now. I shall go and solve them. Link to comment Share on other sites More sharing options...
Ogractor Posted August 26, 2014 Share Posted August 26, 2014 a+b=c Link to comment Share on other sites More sharing options...
(PSN)CrimsonShinku Posted August 26, 2014 Share Posted August 26, 2014 rule of three. it's simple, it's easy, and extremely useful for a myriad of real life situations one encounters. and yet for some reason, most people in most forums i go to don't have a clue about it, much less anything more complicated. Link to comment Share on other sites More sharing options...
Niryco Posted August 26, 2014 Share Posted August 26, 2014 Show me the questions right now. I shall go and solve them. don't have a question now, but whenever one has to prove that a differential of say sin(x) is equal to -cos(x) using limits, that is where i get stumped. Link to comment Share on other sites More sharing options...
Renegade343 Posted August 26, 2014 Author Share Posted August 26, 2014 don't have a question now, but whenever one has to prove that a differential of say sin(x) is equal to -cos(x) using limits, that is where i get stumped. What are the limits? This would be fun to do when I am bored. Link to comment Share on other sites More sharing options...
Imaru Posted August 26, 2014 Share Posted August 26, 2014 don't have a question now, but whenever one has to prove that a differential of say sin(x) is equal to -cos(x) using limits, that is where i get stumped. I remember doing that. Those limit proofs were the bane of my existence. Link to comment Share on other sites More sharing options...
Renegade343 Posted August 26, 2014 Author Share Posted August 26, 2014 a+b=c Please provide two more equations with a, b and c only so that I can solve them, since three unknowns must need three equations to solve. Link to comment Share on other sites More sharing options...
noveltyhero Posted August 26, 2014 Share Posted August 26, 2014 I'd contribute to the forums more but I am still clearing my head before school starts again, PS. Who finds matrices confusing? (I don't but I find it annoying when people do) Link to comment Share on other sites More sharing options...
Renegade343 Posted August 26, 2014 Author Share Posted August 26, 2014 PS. Who finds matrices confusing? (I don't but I find it annoying when people do) I use them in place of doing the elementary simultaneous equation method of solving x equations with x unknowns (where x ∈ N). Link to comment Share on other sites More sharing options...
noveltyhero Posted August 26, 2014 Share Posted August 26, 2014 I use them in place of doing the elementary simultaneous equation method of solving x equations with x unknowns (where x ∈ N). The amount of maths is surprising here, out of curiosity are you studying at uni or something? Link to comment Share on other sites More sharing options...
Niryco Posted August 26, 2014 Share Posted August 26, 2014 (edited) What are the limits? This would be fun to do when I am bored. I am quite bad at my math at the moment, but limits is like allowing x to approach a certain value where f(x) would be infinity if x was that value. Say limit -> x to 1 where f(x) is equal to (x^2 - 1)/(x - 1). If you let x = 1 you would realize you would get 0/0 which is an undefined number, well it should technically be 1 however any number divided by 0 in mathematical theory is equal to infinity. So you let x = to any integer value close to 1, an example is 0.5 and the other x value to be greater than 1 at 1.5. The value that f(x) would be if it was 1 using limits should approach 2 but never be 2. Thus you just solved for limit x -> 1 where f(x) is equal to (x^2 - 1)/(x - 1) is 2. I remember doing that. Those limit proofs were the bane of my existence. Gah save me from proving dy/dx [sin(x)/Cos(x)] = tan(x) I can't take it anymore! Edited August 26, 2014 by Jacate Link to comment Share on other sites More sharing options...
Renegade343 Posted August 26, 2014 Author Share Posted August 26, 2014 I am quite bad at my math at the moment, but limits is like allowing x to approach a certain value where f(x) would be infinity if x was that value. Say limit -> x to 1 where f(x) is equal to (x^2 - 1)/(x - 1). If you let x = 1 you would realize you would get 0/0 which is an undefined number, well it should technically be 1 however any number divided by 0 in mathematical theory is equal to infinity. So you let x = to any integer value close to 1, an example is 0.5 and the other x value to be greater than 1 at 1.5. The value that f(x) would be if it was 1 using limits should approach 2 but never be 2. As you just solved for limit x -> 1 where f(x) is equal to (x^2 - 1)/(x - 1) is 2. No. I already know what limits are. What I mean is for that question you gave me, what are the limits? Link to comment Share on other sites More sharing options...
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