Determine if the following system is linear and/or time-invariant y(t) = cos(3t) x(t)

The following system is not linear.

The following system is time-invariant

Step-by-step explanation:

To determine whether a system is linear, the following condition must be satisfied:

For , we have

In trigonometry, we have that:

So

Since , the system is not linear.

If the signal is not multiplied by time, it is time-invariant. So . Now, for example, if we had it would not be time invariant.

answer: h

step-by-step explanation:

answer: 1+1

step-by-step explanation: 1+1 is at least 2