Question 869107
Use a substitution,
{{{u=tan(x)}}}
{{{u^2+3u-10=0}}}
{{{(u+5)(u-2)=0}}}
Two "u" solutions:
{{{u+5=0}}}
{{{u=-5}}}
{{{tan(x)=-5}}}
{{{x=281.3}}} and {{{x=101.3}}}
and
{{{u-2=0}}}
{{{u=2}}}
{{{tan(x)=2}}}
{{{x=63.4}}} and {{{x=243.4}}}