00:01
You have been given y is equal to minus 3 cost of 4x minus pi plus 2.
00:08
Now if you talk about the amplitude, amplitude is directly the mod of this value, the coefficient of the multiplication of some function.
00:17
Therefore we can say the amplitude is 3.
00:21
Or you can even mention that since there is a plus 2 in the graph, the value would change.
00:26
But the from displacement from the mean position would not change.
00:29
The displacement will remain to be 3.
00:32
Therefore, the amplitude comes out to be 3.
00:34
Now, finding out the period.
00:36
We know that the period of sine nx, nx or we can say sign n theta, is given as 2 pi by n.
00:45
Therefore, if you see in the question, we have 4 over here...