Question 518176
<pre>
{{{sin (alpha + beta)/( cos(alpha)cos(beta) )}}}    =    {{{tan(alpha)}}} + {{{tan(beta)}}}

{{{(sin(alpha)cos(beta)+cos(alpha)sin(beta))/( cos(alpha)cos(beta) )}}}

{{{(sin(alpha)cos(beta))/( cos(alpha)cos(beta) )}}} + {{{(cos(alpha)sin(beta))/( cos(alpha)cos(beta) )}}}

{{{(sin(alpha)cross(cos(beta)))/( cos(alpha)cross(cos(beta)) )}}} + {{{(cross(cos(alpha))sin(beta))/( cross(cos(alpha))cos(beta) )}}}

{{{sin(alpha)/cos(alpha)}}} + {{{sin(beta)/cos(beta) }}}

{{{tan(alpha)}}} + {{{tan(beta)}}}

Edwin</pre>