Just realised that,
x=1/3(tan(theta))^2,
so there should be some nice cancelations to make!
(,
Thu 12 Dec 2013, 12:10,
archived)
x=1/3(tan(theta))^2,
so there should be some nice cancelations to make!
But but butis that thing I did with the "t" to find the "x" legal? I was totally ad-libing there...
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Thu 12 Dec 2013, 17:17,
archived)
seems ok as you did define x, t, dx, dt, might be worth showing dx/dt or dt/dx to show how you got dx & dt though...As far as I can see your equals signs hold everywhere which means it must be true! If the question didn't demand a specific substitution you should be fine. Merry Christams and good luck, also what is your field of study?
(,
Thu 12 Dec 2013, 18:02,
archived)
Engineering watch officerAka officer that's a mechanic on-board big ships (500 tons up).
Started last year. Passed all my exams except maths...
So I'm on the lookout for math trickery involving integrals and derivatives.
(,
Thu 12 Dec 2013, 18:06,
archived)
Started last year. Passed all my exams except maths...
So I'm on the lookout for math trickery involving integrals and derivatives.
And trigonemetryBut the calculus kind...
Cos(x)^3=cos(1-sin(x)^2) mumbo jumbo.
I'm so shit at trigo...
That's why I do thermodynamics and no map reading.
(,
Thu 12 Dec 2013, 18:17,
archived)
Cos(x)^3=cos(1-sin(x)^2) mumbo jumbo.
I'm so shit at trigo...
That's why I do thermodynamics and no map reading.
Trig is a bastard, it's worth knowing the complex exponential forms of sine and cosine as you can then avoid trying to remember the identities.ie.
sin(x)=1/(2i)(e^(ix)-e^(-ix))
and,
cos(x)=1/2(e^(ix)+e^(-ix)
where,
i=sqrt(-1) (you might know 'i' as 'j')
Other than that I can only tell you the trick to learning maths is do lots of problems,
until your sick of em...
and then do some more.
Good luck with your studies :D
(,
Thu 12 Dec 2013, 20:34,
archived)
sin(x)=1/(2i)(e^(ix)-e^(-ix))
and,
cos(x)=1/2(e^(ix)+e^(-ix)
where,
i=sqrt(-1) (you might know 'i' as 'j')
Other than that I can only tell you the trick to learning maths is do lots of problems,
until your sick of em...
and then do some more.
Good luck with your studies :D