Answer to Question #42390 in Calculus for shasha

Question #42390
Describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x).
f(x) = 9 cos x ; g(x) = cos x

Horizontal stretch by a factor of 9

Vertical stretch by a factor of 9

Horizontal shrink by a factor of one-ninth

Vertical shrink by a factor of one-ninth


How can I calculate this please sorry for bother you
1
Expert's answer
2014-05-14T03:33:40-0400
If we take x=0 we obtain that g(x)=1 and f(x)=9. So, we see that f(x)=9g(x) in x=0.
The right answer: Vertical stretch by a factor of 9.

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