Question

Arguement of -1-i is pls​

Answer 1

$let \\ z = - 1 - i \\ z = ( - 1) + ( - 1)i \\ then \\ a = - 1 \: \: \: \: \: b = - 1 \\ arg(z) = \tan {}^{ - 1} ( \frac{b}{a} ) \\ = \tan {}^{ - 1} ( \frac{ - 1}{ - 1} ) \\ = tan {}^{ - 1} (1) = \frac{\pi}{4} \: \: or \: 45 {}^{ {}^{o} }$