To simplify this expression, we first need to recognize that arccos(0) = π/2 and arctg(√3/3) = π/6.
Therefore, the expression becomes:
4(π/2) + 18(π/6)= 2π + 3π= 5π
So, the simplified expression is 5π.
To simplify this expression, we first need to recognize that arccos(0) = π/2 and arctg(√3/3) = π/6.
Therefore, the expression becomes:
4(π/2) + 18(π/6)
= 2π + 3π
= 5π
So, the simplified expression is 5π.