Tips for Beginners for the TI 89 Calculator

In case the calculator was actually off, key the ON button once and again try turning up the contrast. If the screen comes on dark, try turning the contrast down by keying Diamond - continuously for a few seconds. ... For example DeMoivre’s Theorem says that the cube roots of 2i = 2 ei /2 are ³ 2 ei( /2+2 k)/3, with k = 0, 1, 2. To graph ... ................
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