Question 685105
if {{{theta=pi/8}}}, than

{{{sin(pi/8)=(1/2)(sqrt(2-sqrt(2)))=0.38268343236508977}}}

{{{cos(pi/8) =(1/2)(sqrt(2+sqrt(2)))= 0.9238795325112867}}}

{{{tan(pi/8) = 0.38268343236508977/0.9238795325112867=0.4142135623731}}}