Question 720359
I tend to convert radians to degrees so I can 
visualize the angle.
{{{ pi/3 {{{ radians = {{{ 180/3 }}} degrees
{{{ pi/3 }}} radians = {{{ 60 }}} degrees 
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{{{ pi/2 }}} radians = {{{ 180/2 }}} degrees
{{{ pi/2 }}} radians = {{{ 90 }}} degrees
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(1)
I'll do the conversions to degrees:
{{{ cos( 60 ) + sin( 90 ) }}}
{{{ 1/2 + 1 = 3/2 }}}
(2)
{{{ 4*cos( 60 ) + 3*tan( 60 ) }}}
{{{ 4*(1/2) + 3*( sqrt(3)/1 ) }}}
{{{ 2 + 3*sqrt(3) }}}