\begin{tikzpicture}[xscale=1,yscale=.5][domain=-3.6:3.6]
\draw[very thin,color=blue] (-5,-6.1) grid (5,6.29);
\draw[->] (-4.3,0) -- (4.3,0) node[right] {$x$};
\draw[->] (0,-6.2) -- (0,6.2) node[above] {$f(x)$};
\draw[ultra thick,color=blue] plot[id=sinh,domain=-2.6:2.6] function{sinh(x)} node[right] {$f(x) = \sinh x$};
\draw[ultra thick,color=cyan] plot[id=cosh,domain=-2.5:2.5] function{cosh(x)} node[left] {$f(x) = \cosh x$};
\draw[ultra thick,color=brown] plot[id=tanh] function{tanh(x)} node[right] {$f(x) = \tanh x$};
\draw[ultra thick,color=magenta] plot[id=coth,domain=-3.6:-0.15] function{1/tanh(x)} node[above] {$f(x) = \coth x$};
\draw[ultra thick,color=magenta] plot[id=coth,domain=0.15:3.6] function{1/tanh(x)} node[above] {$f(x) = \coth x$};
\draw[ultra thick,color=green] plot[id=sech] function{1/cosh(x)} node[right] {$f(x) = 1/\cosh x$};
\draw[ultra thick,color=blue] plot[id=sin] function{sin(x)} node[right] {$f(x) = \sin x$};
\node[below] at (-3,-6) {\rotatebox{90}{$2015$}};
\end{tikzpicture}