<PRE><B>Question 779175</B>
You can subtract any multiples of {{{ 2*pi }}} without
changing the expression
Subtract {{{ 6*pi  = (66/11)*pi }}}
{{{ (71/11)*pi - (66/11)*pi = (5/11)*pi }}}
This is less than {{{ pi/2 }}} since {{{ 5.5/11 = pi/2 }}}
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{{{ ( 5/11 )*pi = ( 5*3.141 ) / 11 }}}
{{{ ( 5/11 )*pi = 1.4277 }}}
{{{ cos( 71*pi/11 ) = cos( 1.4277 ) }}}
This is the cosine of an angle in radians
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