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Jul
16
asked The line with equation $y=4x+c$ is a tangent to the curve with equation $y=x^2-x-5$
Jul
15
awarded  Quorum
Jul
15
comment Find the acute angle of intersection of the curves $y=\cos x$ and $y=e^{-x}$ at the point $(0,1)$.
because If i have $-2$ how about that?
Jul
15
comment Find the acute angle of intersection of the curves $y=\cos x$ and $y=e^{-x}$ at the point $(0,1)$.
sorry, how come $\frac{\pi}{4}$ ? thx
Jul
15
accepted Find the acute angle of intersection of the curves $y=\cos x$ and $y=e^{-x}$ at the point $(0,1)$.
Jul
15
comment Find the acute angle of intersection of the curves $y=\cos x$ and $y=e^{-x}$ at the point $(0,1)$.
why is $45^{\circ}$, it is because $tan(1)=45^{\circ}$? thx
Jul
15
revised Find the acute angle of intersection of the curves $y=\cos x$ and $y=e^{-x}$ at the point $(0,1)$.
edited body
Jul
15
asked Find the acute angle of intersection of the curves $y=\cos x$ and $y=e^{-x}$ at the point $(0,1)$.
Jul
14
accepted Find the magnitude of the acute angle between the lines $2y+3x=4$ and $x+y=5$.
Jul
14
revised Find the magnitude of the acute angle between the lines $2y+3x=4$ and $x+y=5$.
added 104 characters in body
Jul
14
asked Find the magnitude of the acute angle between the lines $2y+3x=4$ and $x+y=5$.
Jun
26
accepted antiderivative of $\frac{dy}{dx}$
Jun
26
asked antiderivative of $\frac{dy}{dx}$
Jun
12
accepted How to sketch $y=2\tan(x+\frac{\pi}{4})$ , $x \in (0,2\pi)$
Jun
8
awarded  Caucus
Jun
3
accepted logarithmic find value N.
Jun
3
accepted Let $f(x)=\frac{2x+1}{\sin(x)}$ find $f'(x)$
Jun
3
asked Let $f(x)=\frac{2x+1}{\sin(x)}$ find $f'(x)$
Jun
2
comment Determining the derivative of $e^{5x}\tan(2x)$
So, it should be $e^{5x}tan2x$! and the question from paper is mistake! thx
Jun
2
comment Determining the derivative of $e^{5x}\tan(2x)$
I don't know, In the question it is like that exactly. It is possible mistake?