Class X

What is the amplitude of the function f(x) = -3cos(πx)?
  1. 3
  2. -3
  3. π
  4. 2
What is the period of f(x) = 0.5 sin(x) cos(x)?
  1. 0.5
  2. 2 π
  3. π / 2
  4. π
If y = cos x, then what is the maximum value of y?
  1. 1
  2. -1
  3. 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
What is the amplitude of f(x) = sin(x) + cos(x)?
  1. √2
  2. √2 / 2
  3. 2 √2
  4. 2
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