The first derivative
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cos(x)*sinh(x) + cosh(x)*sin(x)
$$\sin{\left(x \right)} \cosh{\left(x \right)} + \cos{\left(x \right)} \sinh{\left(x \right)}$$
The second derivative
[src]
$$2 \cos{\left(x \right)} \cosh{\left(x \right)}$$
The third derivative
[src]
2*(cos(x)*sinh(x) - cosh(x)*sin(x))
$$2 \left(- \sin{\left(x \right)} \cosh{\left(x \right)} + \cos{\left(x \right)} \sinh{\left(x \right)}\right)$$
-4*(cos(x)*sinh(x) + cosh(x)*sin(x))
$$- 4 \left(\sin{\left(x \right)} \cosh{\left(x \right)} + \cos{\left(x \right)} \sinh{\left(x \right)}\right)$$