Question 1089034

Side opposite the 60 degree angle:  {{{ 13*sqrt(3) }}}
Side opposite the 90 degree angle:  {{{ 26 }}}

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Workout:
Use Law of Sines and solve for unknowns (a=side opposite 60, h=side opposite 90):
{{{ sin(30)/13 = sin(60)/a = sin(90)/h }}}

Check:   {{{ a^2 + 13^2 = (13sqrt(3))^2 + 169 = 507 + 169 = 676 = 26^2 = h^2 }}}  (ok)