Hi friends,

I trust you are all doing well...I have here g(x)=aCos(x-30)...now they ask to calculate a...for 4 marks

I know that a is the amplitude, and I can read it of the graph, it's 1.

How do we calculate that?..Please help. Thank you kindly..

juriemagic Jun 9, 2023

#1**+1 **

I do not think your question is complete Juriemagic.

Anyway your question is presumably in degrees.

the amplitude is 'a', the wavelength is 720 degrees (2pi radians)

and the diplacement is 30 degrees to the right

Melody Jun 11, 2023

#2**+1 **

Hi Melody,

Thanks for your feedback...well, the question how I gave it is preceisely how it is on the paper...They give the graph, you can clearly see "a" is 1, yet they ask to calculate "a" for 4 mnarks...anycase, thanks for your time...always appreciated...stay well..

juriemagic
Jun 11, 2023