• Radian, 70, 115, 249

  • Radicals, 24, 332; addition of, 336; division of, 338; equations with, 414; ­multiplication of, 338; simplest form, 332; subtraction of, 336

  • Radicand, 333

  • Radius, 68, 579; vector, 117, 609

  • Range, 89, 102, 301, 559, 639

  • Ratio, 41, 500; common, 519

  • Rational number, 2, 524

  • Rational roots, 228, 431

  • Rationalizing: denominator, 334, 340; ­numerator, 341

  • Ray, 55

  • Reactance, 364

  • Real axis, 352

  • Real numbers, 2

  • Reciprocal, 4, 122

  • Rectangular coordinate system, 94

  • Rectangular form of complex number, 347

  • Rectangular solid, 76

  • Reference angle, 243

  • Regression, 145, 576, 642

  • Relation, 92, 559

  • Relative frequency, 622

  • Remainder, 37

  • Remainder theorem, 421

  • Repeating decimal, 524

  • Resistance, 364

  • Resolution of vector, 268

  • Resonance, 368

  • Resultant ...

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