anonymous
  • anonymous
Which description matches the transformations y = cos x undergoes to produce y = 2cos(-x) - 4?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
the -x part does nothing because cosine is even and so \[\cos(-x)=\cos(x)\]
anonymous
  • anonymous
\[2\cos(x)\] has a amplitude 2, so goes form -2 to 2 instead of from -1 to 1 then -4 at the end moves the whole graph down 4 units, instead of going from -2 to 2 it goes from -6 to -2
anonymous
  • anonymous
A. Horizontal compression by factor 2, vertical shift by 4 units up, then a reflection across the x-axis B. Reflection across the y-axis, vertical stretch by factor 2, then a vertical shift down 4 units C. Reflection across the y-axis, vertical shift of 2 units, horizontal shift right by 4 units D. Horizontal shift left 1 unit, then vertical shift down by 4 unit

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anonymous
  • anonymous
B but that is a very stupid answer
anonymous
  • anonymous
since you cannot see the reflection across the y - axis!
apoorvk
  • apoorvk
cosx and cos(-x) are same. becaus edoesnt matter how you turn the angles on the plane, cos takes same values so graph: |dw:1332424688035:dw|
anonymous
  • anonymous
thank YOU!!! :D

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