18 questions linked to/from Can Reduce *really* not solve for x here?
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### Why doesn't Mathematica solve $x=\cos\,x$ properly? [duplicate]

Why doesn't Mathematica solve x == Cos[x] properly? Both Solve and NSolve fail with the ...
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### How do I solve for the roots of $\sin(x) - x^2=0$? [duplicate]

I have defined h[x] := Sin[x] - x^2. When I submit Solve[h[x] == 0, x], Mathematica tells me Solve::nsmet: This system ...
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### Why Wolfram|Alpha can solve an equation but not Mathematica? [duplicate]

I want to numerically solve $$\cosh\left(\frac{1}{x}\right)-\frac{1}{x^2}\sinh\left(\frac{1}{x}\right)=0.$$ A strange thing is that Wolfram|Alpha it solves it perfectly, but Mathematica I have this: ...
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### How can I solve $\coth (2 x )=x$? [duplicate]

I have this equation $$\coth (2 x )=x$$ and I want to solve it to find $x$. The methods Solve and Reduce do not work. Coth[2 x] == x
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### Solve $1/a - \sin(1/a)$ [duplicate]

I need to find $a$ from this equation: Solve[(2*b)/a - 1/(n*π)*Sin[(2*n*π*b)/a] - 1/2 == 0, a] but I get the response: Solve::nsmet: This system cannot be ...
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### I need help solving this hyperbolic equation [duplicate]

I have some data and I'd like to calculate the radius of curvature. The formula is: $$R_{oc}\space Sinh\left[\frac{D_{LSS}}{R_{OC}}\right]=\frac{s_*}{\theta_*}$$ Noting that $s_*$ is sh, $\theta_*$ ...
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### Why can't Mathematica solve this equation? [duplicate]

Possible Duplicate: Can Reduce *really* not solve for x here? Why can't Mathematica solve this equation? ...
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### Problem with solving an equation [duplicate]

I dont understand why Mathematica cannot solve this equation: Solve[Log[x^2 + 5] + 0.5 x + 1 == 0, x] I get this error message: Solve::inex: Solve was unable to solve the system with inexact ...
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### Closed solutions for FindRoot, no solutions for Reduce or Solve [duplicate]

Reduce, Solve and FindRoot all appear to struggle with this: ...
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### Why doesn't mathematica recognize the exponential expression with Solve but it will plot it written exactly the same way? [duplicate]

I can Plot these two functions written exactly this way and see intersection but Solve will not recognize the exponential expression. Please help me with feedback... Solve[1/3Exp[-x/5]==Cos[x], x]
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### How do I work with Root objects?

I want to solve the trigonometric equation : $$(3-\cos 4x )\cdot (\sin x - \cos x ) = 2.$$ I tried Solve[(3 - Cos[4*x])*(Sin[x] - Cos[x]) == 2, x] It returns the ...
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### Interlacing a single number into a long list

This seems like it should be a simple question, but I am running into some difficulty in doing this with Mathematica. Right now, I have a list like this: ...