Solve for y
\left\{\begin{matrix}y=\frac{\tan(x)}{x}\text{, }&\nexists n_{1}\in \mathrm{Z}\text{ : }x=\pi n_{1}+\frac{\pi }{2}\text{ and }x\neq 0\\y\in \mathrm{R}\text{, }&x=0\end{matrix}\right.
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xy=\tan(x)
Swap sides so that all variable terms are on the left hand side.
\frac{xy}{x}=\frac{\tan(x)}{x}
Divide both sides by x.
y=\frac{\tan(x)}{x}
Dividing by x undoes the multiplication by x.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
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Linear equation
y = 3x + 4
Arithmetic
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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