Impedance of L and C in parallel Calculator

Calculates the impedance of the inductor and capacitor in parallel.

Impedance of L and C in parallel
Inductor L
Capacitor C
Frequency f 

Impedance |Z|
    1.  
    2. Ω
Phase φ
    1.  
    2. degree
    Impedance of L and C in parallel
    [1-5] /5Disp-Num
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    [1]  2019/03/10 23:33   Male / 60 years old level or over / A retired person / Very /
    Comment/Request
    What is the formula for the Phase of the parallel RC circuit? On the page I see φ = 1/ 2πFL. If I input that I get the wrong phase. -90° comes out as 90°. MY exact formula is as follows: Arctan(-(1 /2πFL)) * (180 / π) to get the radians to degrees. Am I missing something? All the other pages seem to work but this one is missing something, or maybe it's me.
    [2]  2017/10/30 12:02   Male / 60 years old level or over / A retired people / Very /
    Purpose of use
    TANK CKT Z
    [3]  2016/05/02 02:40   Male / 20 years old level / High-school/ University/ Grad student / Very /
    Purpose of use
    comparing experimental values , with theoretical values
    [4]  2015/03/23 02:07   Male / 50 years old level / Others / Useful /
    Purpose of use
    fan.
    Comment/Request
    good and practical method for electric-calculator.
    [5]  2011/07/27 08:03   Male / 60 years old level / Others / Very /
    Comment/Request
    (1) slow in my computer
    (2) how about a calculator for RL parallel to RC, this is very useful for pf correction

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