Input: `tangent(sin(x),x=1)`
Compute: $$tangent(sin(x),x=1)$$
Result: $$(-cos(1))+sin(1)+cos(1)\ x$$
LaTeX:(-cos(1))+sin(1)+cos(1)\ x
$$tangent(sin(x),x=1) == (-cos(1))+sin(1)+cos(1)\ x$$