Question

y=2cos(2pix)
Amplitude___
period______
horizontal shift_______
vertical shift_________

Answer 1

http://www.purplemath.com/modules/grphtrig.htm

Answer 2

that's not helping I need the answers

Answer 3

$$
y=A\cos(\cfrac{2\pi}{T}x+\phi)+b
$$
Where A is the amplitude, T is the period, \(\phi\) is the horizontal shift and b is the vertical shift.

I'll help with the period. For your equation,
$$
\cfrac{2\pi}{T}=2\pi\\
$$
So T=1.
A, \(\phi\) and b you can do easily by inspection.

Hope this helps.

Answer 4

amp is 1 horz and vert shifts are 0?

Answer 5

amp is not 1 but you've got the horz and vert shifts right

Answer 6

@mathmale @Mertsj @ranga can any of you help me?

Answer 7

That amplitude is the coefficient of the function. In this case it is 2cos so the amplitude is 2

Answer 8

The coefficient of x is 2pi
The coefficient of x = 2pi/period
So: 2pi = 2pi/period
Solve that for the period

Answer 9

@Mertsj is the period 1?

Answer 10

yes

Answer 11

And the shifts arer both 0? @Mertsj

Answer 12

yes