Tham KY's answer to Rae Kuan's Junior College 2 H2 Maths Singapore question.
May i clarify why arg(u) is 0?
Not 0, is detta..
Polar form: re^(i detta)= r[cos(detta)+i sin(detta)]
oh right, it is arg(sin(θ)) that is 0. thanks
sin(detta) is a purely real number. Given 0
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