Question 879218

{{{cos(pi +Arcsin(1/2))}}}


{{{Arcsin(1/2))=pi/6}}}, so we have


{{{cos(pi +pi/6)}}}

={{{cos((6pi +pi)/6)}}}

={{{cos(7pi/6)}}} .....{{{pi=3.14}}}

={{{cos((7*3.14)/6)}}}

={{{cos(21.98/6)}}}

={{{cos(3.663333333333333)}}}

={{{-0.8669529561925531}}}

={{{-0.87}}}