<solveEquations> erroneous results for functions with vertical asymptotes

[virginiaMae]

The <solveEquations> component sometimes gives solutions where functions have vertical asymptotes, as shown in the following example for the tangent function (eq3).

`

Eq1: cos(x) = 1/2

Eq2: sin(x) = -sqrt(3)/2

Eq3: tan(x) = 1

$eq1
$eq2
$eq3

Solutions, Eq 1 = $solve1.solutions

Solutions, Eq 2 = $solve2.solutions

Solutions, Eq 3 = $solve3.solutions

tan(x) y = 1 ($solve3.solutions[$i], $$f($solve3.solutions[$i]))

$solve3.solutions[6]
`