Question

$1. sin (frac{ pi }{2}-arccos frac{ sqrt{3}}{3}) = 2. sin(pi-arcsinfrac{2}{5}) = 3. arccos(-frac{ sqrt{3} } {2})+1$ =

Answer 1

1)cos(arccos√3/3)=√3/3
2)sin(arcsin2/5)=2/5
3)5π/6+1