Power Reduction Formulas

RMS (Root Mean Square) of a Sinusoid

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Menu (linked Index) RMS (Root Mean Square) of a Sinusoid Last Update: October 9, 2025 Introduction Approximate RMS of a Sinusoidal Curve RMS Equation: Continuous Form RMS for Current Derived from the Continuous RMS Equation Introduction In this post I’m going to show two ways to compute the Root Mean Square (RMS) of a set […]

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Sum and Difference Angle Formula Proofs

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Menu (linked Index) Sum and Difference Angle Formula Proofs Last Update: October 7,2025 Introduction Right Triangle Trig Functions Two Right Triangles Define the Sides Sin and Cos Angle Sum Formulas Sin and Cos Angle Difference Formulas Tan Angle Formulas Summary of Sin, Cos, Tan Angle Formulas Introduction In this post, I derive the sine, cosine,

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