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4 years ago

Consider the function y = 2cos(-x)-4. What effect does "-x" have on the basic graph?

Mathematics

1 answer:

Alexxx [7]4 years ago

4 0

Answer:

But really there is no effect since cos(-x)=cos(x).

Step-by-step explanation:

Cosine is an even function.

Even functions are symmetric about the y-axis.

So really for cosine; cos(-x) has no change to cos(x) since they are equal.

But if you keep in mind that cosine is symmetric about the y-axis, then it has been reflected over the y-axis; this is the vertical axis.

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3 years ago

Write the expression x^2+8x-5 and x^2-4x-2 in the form (x+a)^2 +b

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3 years ago

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zalisa [80]

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2 years ago

If M is the midpoint of PQ and X is the midpoint of PM then PX = a PQ Which statement is True? a is equal to 1 a is equal to 1/2

garik1379 [7]

Answer:

D. a is equal to $\frac{1}{4}$

Step-by-step explanation:

Let us assume that segment PQ is 8 units, so that its midpoint M is at 4 units to both P and Q.

Given that X is the midpoint of PM, this implies that X is at 2 units to both P and M.

Then;

PX = aPQ

⇒ = a x 8

= 8a

Therefore, a must be equal to $\frac{1}{4}$ , so that;

PX = 8a

= 8 x $\frac{1}{4}$

= 2 units

Thus, a is equal to $\frac{1}{4}$ is the correct option.

6 0

4 years ago

The angle of the triangle are in the ratio 5:6:9 what is the measure of each angle

sveta [45]

The angles are in the ratio of 5:6:9.
Let the angles be represented by:

5x, 6x, and 9x.

The sum of the interior angles of a triangle is 180.
5x + 6x + 9x = 180
20x = 180
x = 9

The angles are 5*9 = 45,
6*9 = 54,
and
9*9 = 81.

8 0

3 years ago