HP 35s HP 35s scientific calculator - User Guide - Page 86
Conversion with Vectors., R
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8 6 Sets complex coordinate mode. Convert xiy (rectangular) to rθ a (polar). Example: Conversion with Vectors. Engineer P.C. Bord has determined that in the RC circuit shown, the total impedance is 77.8 ohms and voltage lags current by 36.5º. What are the values of resistance R and capacitive reactance XC in the circuit? Use a vector diagram as shown, with impedance equal to the polar magnitude, r, and voltage lag equal to the angle, θ, in degrees. When the values are converted to rectangular coordinates, the x-value yields R, in ohms; the y-value yields XC , in ohms. R θ R Xc _36.5o C 77.8 ohms Keys: 9 Display: Description: Sets Degrees and complex ¹8 coordinate mode. Enters θ, degrees of voltage lag. Enters r, ohms of total impedance Calculates x, ohms resistance, R. Calculates y, ohms reactance, XC 4-12 Real-Number Functions