# Question about zero input frequency response

• royzizzle

#### royzizzle

Zero input means input equals zero

the input is to some differential equation D2x = Dx + x + Input

the input = sin(2pi * f * t)

so say I want to make a program that solves for the zero input frequency response. (Matlab actually)

what would I need to set the variable for frequency to be? would it be 1/(4t) ? to make the input always sin(pi/2) = 0? or do I make the frequency equal to zero.

I'm doing this for my research professor btw

what would I need to set the variable for frequency to be? would it be 1/(4t) ? to make the input always sin(pi/2) = 0? or do I make the frequency equal to zero.

Why wouldn't you just set the frequency to zero?
and btw. What is sin(pi/2)?! (hint: not zero).

why wouldn't you just set the frequency to zero?
And btw. What is sin(pi/2)?! (hint: Not zero).

yes you are right!

Ive cemented my status as a retard

:[

I knew I should have studied my unit circle harder

GOD IM SO STUPID IVE BEEN WRITING A PROGRAM THAT sets the value for f depending on the time vector specified

so much time wasted

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lol, don't worry about it man; we learn best from our failures.
Acknowledging being stupid (at times) is a very important form of wisdom (Socratic wisdom).