Question

Determine o período e o conjunto imagem, construindo o gráfico de um período completo para cada função dada.a) por f(x) = 1+ 4 sen x.b) por f(x) = 2sen (x-3)

Answer 1

Answer:

The given functions are

$f(x)=1+4sinx$

$f(x)=2sin(x-3)$

The sine function has a standard period of $2 \pi$ by definition. However, this might change if we use a factor as coefficient of the x-varible, but in this case we don't have that.

Therefore, the period of both trigonometric functions is $2 \pi$.

Now, the images of each function is the y-variable set values that defines each function.

So, the function $f(x)=1+4sinx$ has an image defined by the set $[-3,5]$. It's impotant to notice that the range of a standard function is [-1,1], however, in this case, the function was shifted 1 unit up and it was streched by a factor of 4, that's why the standard image changes to $[-3,5]$.

About the second function $f(x)=2sin(x-3)$, the image set is $[-2,2]$, because the function was streched by a factor of 2.

Additionally, the image attached shows the graph of the given functions.