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9 August, 00:36

Which description matches the transformations y=cosx undergoes to produce y = - 2cos3x

A. Horizontal compression by factor 1/3, vertical stretch by factor 2, then a reflection through the x-axis

B. reflection through the y-axis, vertical shift of 2 units, horizontal shift right by 3 units

C. Horizontal shift 2 units, then vertical shift up by 3 units

D. Horizontal stretch by factor 2, reflection through the x-axis, then the vertical stretch by factor 3

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Answers (1)
  1. 9 August, 00:44
    0
    The 3 before the x causes a horizontal compression, the - 2 causes a vertical stretch followed by reflection in x axis. Its A
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