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/sci/ - Science & Math

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2204011 No.2204011 [Reply] [Original]

> mfw the majority of my mathematical methods in physics class couldn't integrate tangent
> mfw he set worked it out, and just didn't write down the trivial u-substitution.
> mfw someone asked what he did at that step because he didn't follow

>> No.2204021
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2204021

>mfw you consider yourself superior to other people just because you can do calculus

>> No.2204032

>>2204021
Nope, that's not it at all, they are all physics majors in a mathematical physics class, and they couldn't do something from high school. Not superior because of that bro

>> No.2204041

If he didn't do the u-substitution, then what did he do!?

>> No.2204045

I understand your pain op

God forbid any math teacher skip steps to make the class go faster.

When I took physics and calc the teacher had to show steps for when he subtracted numbers from one side of the equation because if he didn't someone would raise their hand to ask where he got the new number from.


Took 5 minutes to work out simple trig to find angles and measurements needed to solve the rest of the

>> No.2204049

>>2204011
i'm a phd student in aerospace sciences. i'd have to look it up or put it in matlab.

i think by virtue of learning and utilizing far more advanced math, i've earned the right to use tools to remember the trivial shit that doesn't really matter.

>> No.2204053

>>2204041

I need to know this as well.

>> No.2204064

>>2204041
Oh he did the substitution, he just didn't explicitley write down "u = cosx" He did this:

int(tanx)dx
=int(sinx/cosx)dx
= - int(1/u)du
= -ln(cosx)+c

>> No.2204066
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2204066

>>2204011
>mfw I learned this in grade eleven... 3 weeks ago...

>mfw

>>>/b/

>> No.2204068

>>2204064

Ohhh I see what you were saying, yeah that's pretty stupid that they didn't realize what he did.

>> No.2204071

hey OP i'm taking mathematical physics next semester. any advice?

>> No.2204087

>>2204071
Not really, it's pretty easy. At my school it's split into two quarters, the first just reviews multivariable calc, linear algebra, differential equations, infinite series, vector calculus, and some complex numbers. Second quarter covers partial diff eq, laplace and fourier transforms, calc of variations, tensor analysis, and complex analysis. If you're good at math or have taken any classes on these before, you're golden.

>> No.2204095

>>2204087
Is this a replacement for regular math courses?

>> No.2204113

>>2204095
No, you still have to take the math courses. Its much more applied and geared towards review of mathematical techniques needed in upper level physics classes.

>> No.2204123

>>2204049
This is basically my thoughts ever since getting my hands on a calculator.

>> No.2204133

Physics major here, I completely checked out of calculus after taking multivariate. Basically I know what I need to do, but I'd much rather just look it up. (Especially when its an inconsequential step on the way to solving a deeper problem)

All that concrete stuff was replaced by algebra, algebraic geometry, linear algebra and topology.