arg(-1)=?

arg(-1)=?

-1=1*(cosπ+isinπ)
So the original formula = π

How many Arg (- I) = in complex function and integral transformation

Arg is the main value of the angle
In some cases, the range is [0,2 π], where Arg (- I) = 3 π / 2
For others, the specified range is (- π, π], where Arg (- I) = - π / 2

Under what circumstances is 0 meaningless in high school mathematics? Just in the plural range. Thank you!

If you ask questions, 0 is meaningful in any situation
The denominator cannot be 0, the power of 0 is meaningless, and 0 cannot be the base in logarithmic function

Is the range of the plural the largest?

In higher mathematics, the range of complex number is still not the largest. But in high school mathematics, that is, in elementary algebra, the range of complex number is the largest. Complex number includes real number and imaginary number, in which the imaginary number whose real part is zero is also called pure imaginary number