Question 1112994
{{{sin(alpha) = sqrt(1-cos(alpha)^2)}}}


{{{cos(alpha)}}}=0.173  , we calculate sin {{{(alpha)}}}=0.9849  

{{{cos(beta)}}}=0.432  we can calculate Sin {{{(beta)}}} = 0.9019

{{{cos((alpha)+(beta))}}}= {{{cos(alpha)*cos(beta)+ sin(alpha)*sin(beta)}}}

plug the values in the identity