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Trigonometric Identities and Their Significance

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Multiple Choice

What is the Pythagorean identity?

  1. sin^2(x) + cos^2(x) = 1
  2. sin(x) + cos(x) = 1
  3. tan(x) = sin(x) / cos(x)
  4. cot(x) = cos(x) / sin(x)
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