Trigonometry Essentials
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Questions and Answers

What is the period of the function y = 2sin(3x)?

  • 2Ï€/3 (correct)
  • Ï€
  • 2Ï€
  • Ï€/3

If sin(x) = 3/5, what is the value of cos(x)?

  • 4/3
  • 12/25
  • 4/5 (correct)
  • 3/4

What is the amplitude of the function y = 2cos(Ï€x)?

  • Ï€
  • 1
  • 4
  • 2 (correct)

In a right triangle, if the length of the hypotenuse is 10 and one of the acute angles is 30°, what is the length of the side opposite the 30° angle?

<p>5/√3 (C)</p> Signup and view all the answers

What is the law of cosines formula for finding the third side of a triangle given two sides and the included angle?

<p>c^2 = a^2 + b^2 - 2ab cos(C) (B)</p> Signup and view all the answers

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