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 Aug 1 comment Short integral question I mean we usualy did like this: $\frac{d}{dx}\sin\left(x^2\right) = \underbrace{\cos\left(x^2\right)}_{\frac{d}{dx}\sinqleft(x^2\right)} \cdot \underbrace{2x}_{\rlap{\text{derivative of what is inside the bracket}}}$ The Wolfram alpha confirms it wolframalpha.com/input/?i=d%2Fdx%20%5Csin(x%5E2)&t=crmtb01 Aug 1 comment Short integral question But there is a rule that $d/dx ~[f(x)] = df(x)/dx \cdot dx/dx$ ... Why do we have such a rule if it doesnt apply for ALL the functions including exponential? Can anyone provide me a solution to this case? Aug 1 comment Short integral question Yes that is what i wanted to write. Where is the catch here??? Aug 1 asked Short integral question Jul 25 comment How do i solve this square root to solve for $y$ and get rid of $x$ at the same time The problem is quite large in fact. I was trying to keep it simple. The full problem is in fact posted in Physics stackexchange here: physics.stackexchange.com/questions/72253/… Jul 25 comment How do i solve this square root to solve for $y$ and get rid of $x$ at the same time I am supposed to get a $y$ but I don't know $x$. I hoped it is possible to get rid of it. Jul 25 comment How do i solve this square root to solve for $y$ and get rid of $x$ at the same time Yes I have. The problem is that above I cannot seem to factor out the 2.25... Jul 25 asked How do i solve this square root to solve for $y$ and get rid of $x$ at the same time Jul 16 comment Solving the trigonometric equation $A\cos x + B\sin x = C$ Are there no easier solutions? Jul 16 asked Solving the trigonometric equation $A\cos x + B\sin x = C$ Jul 15 accepted Solving a simple quadratic equation Jul 15 comment Solving a simple quadratic equation Where does this formula come from? Jul 15 asked Solving a simple quadratic equation Jun 25 accepted Solving $L - L\sqrt{1-\frac{u^2}{C^2}} = u T$ for $u$ Jun 25 asked Solving $L - L\sqrt{1-\frac{u^2}{C^2}} = u T$ for $u$ Jun 19 accepted $\int\sin^2(Cx)\,dx$ from a manual - need proof Jun 19 awarded Yearling Jun 19 comment $\int\sin^2(Cx)\,dx$ from a manual - need proof Good point. Thank you! Jun 19 asked $\int\sin^2(Cx)\,dx$ from a manual - need proof Jun 12 accepted Solid angle definition - can it be seen shown using an image?