Question

A trigonometric graph has the equation y=2cos2∅. State the amplitude of this graph?​

Answer 1

amplitude = 2

Explanation:

Given

y = a cosbx

amplitude = | a | , period =
`(2\pi )/(b)`

y = 2cos2∅

with amplitude = | 2 | = 2

Answer 2

`\displaystyle 2`

Explanation:

`\displaystyle y = Acos(Bx - C) + D \\ \\ Vertical\:Shift \hookrightarrow D \\ Horisontal\:[Phase]\:Shift \hookrightarrow (C)/(B) \\ Wavelength\:[Period] \hookrightarrow (2)/(B)\pi \\ Amplitude \hookrightarrow |A|`

With the above information, you should now tell what the amplitude value is.

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