Question 1043649
{{{sinx=5/6 }}} use {{{cosx^2+sinx^2=1}}}

{{{{sinx^2+cosx^2=1 }}}
{{{cosx^2=1 -sinx^2}}}

{{{cosx^2=1 -25/36}}} 
{{{cosx=  sqrt(1-25/36)}}} note +-sign infront
{{{cosx= sqrt(36/36-25/36)}}} now turn {{{1=36/36}}}
{{{cosx= sqrt(11/36)}}}
{{{cosx= sqrt(11)/6}}}

do the same for tanx= {{{sinx/cosx}}}