Errors when solving an equation

Sokolov · Apr 26, 2020

I'm new with Mathematica and I'm not sure why when I enter this equation an error happens. Could anyone please help me with it?

Mathematica notebook screenshot: input Assuming[Element[n, Integers], Solve[(d/dx ((sin[nx]/sin[x])^2)) == 0, x]], with Tag Times error message showing d sin[nx]^2 over dx sin[x]^2 is Protected, and Solve error stating 0 is not a quantified system of equations and inequalities; output is Solve[0, x].

Dale · Apr 26, 2020

You need to replace your “=“ with “==“. The single “=“ sets the thing in the left to the value on the right. The double “==“ is a logical test of equality and returns True if the left side is equal to the right.

Sokolov · Apr 26, 2020

Okay, how basic was it... Thank you!

Dale · Apr 26, 2020

No problem. The syntax of Mathematica is a little unusual and takes some getting used to. But once you do get used to it it is very clear and concise and nice to work with.

Errors when solving an equation

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