Class X

What is the range of the function f(x) = - 4 cos(2x - 3)?
  1. (0,4)
  2. [0,4]
  3. (-4,4)
  4. [-4,4]
What is the amplitude of f(x) = 4 sin(x) cos(x)?
  1. 4
  2. 3
  3. 2
  4. 1
What is the period of the trigonometric function given by f(x) = 2 sin(5 x)?
  1. π / 5
  2. 2 π / 5
  3. 5 π
  4. π
What is the phase shift of the function f(x) = 7sin(2x - π / 3)?
  1. π / 3
  2. π / 6
  3. - π / 6
  4. - π / 3
Which of the following functions has the greatest period?
  1. f(x) = 20 sin(2x-π/2)
  2. f(x) = - sin(πx)
  3. f(x) = 2 sin(0.1 x)
  4. f(x) = - sin(0.1 π x)
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