How to Quickly Solve 43,200 ÷ 1,200 = 36 Minutes: A Simple Math Breakdown

/Mathematics /Daily Math Skills /Time Calculations /Math Simplification

\[ 43,200 \div 1,200 = 36 \, \text{minutes} \]

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Another example: $ a = 1 $, $ b = e^{i2\pi/3} $:
a^2 = 1, b^2 = e^{i4\pi/3}, a^2 - b^2 = 1 - e^{i4\pi/3}, a^2 + b^2 = 1 + e^{i4\pi/3}.
Numerator: $ 2(1 + e^{i4\pi/3}) $, denominator: $ 1 - e^{i4\pi/3} $, so $ S = 2 \cdot rac{1 + e^{i4\pi/3}}{1 - e^{i4\pi/3}} $. Multiply numerator and denominator by $ e^{-i2\pi/3} $:

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