What is the amplitude of #f(x)=4sin(x)cos(x)#?
1 Answer
Feb 3, 2015
The answer is:
The amplitude of a periodic function is the numer that multiply the function itself.
Using the double-angle formula of sinus, that says:
we have:
So the amplitude is
This is the sinus function:
graph{sinx [-10, 10, -5, 5]}
This is the
graph{sin(2x) [-10, 10, -5, 5]}
and this is the
graph{2sin(2x) [-10, 10, -5, 5]}