A graphing calculator is recommended.A digital delay device echoes an input signal by repeating it a fixed length of time after it is received. If such a device receives the pure note f, (t) = 6 sin(t) and echoes the pure note f2(t) = 6 cos(t), then the combined sound is f(t) = f,(t) + f2(t).(a) Graph y = f(t) and observe that the graph has the form of a sine curve y = k sin(t + 0).y10ry10r514- 244-5-10- 10AVAAy10105-42-4-2214- 1010(b) Find k and p.k =

Given: The device receives the pure note: f1(t)=6sin(t) The device echos the pure note:…

A graphing calculator is recommended. A digital delay device echoes an input signal by repeating it a fixed length of time after it is received. If such a device receives the pure note f;(e) = 6 sin(e) and echoes the pure note f(t) = 6 cos(t), then the combined sound is ft) = f,(e) + f2(e). (a) Graph y= f(e) and observe that the graph has the form of a sine curve y=k sin(t + $). AA AA 10r 10 -10 10 10 -5 -10 -10 (b) Find k and