Question

Вычислите:
a) cos(2arccos1/2 - 3arccos0 - arccos(-1/2))
б) 1/3(arccos1/3 + arccos(-1/3))

Answer 1

а)cos(2*60-пи/2-пи/1.5)=-0.443615746
б) 1/3(1.2309594173407747+1.9106332362490186)=1.0471975511965976