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## Homework Statement

The rms output voltage of an AC source is 180 V, and the operating frequency is 90 Hz. Write the equation giving the output voltage as a function of time t. (Use t as necessary.)

## Homework Equations

[tex](\Delta v) = (\Delta V_{max})sin\omega t[/tex]

[tex]\Delta V_{max}= \sqrt{2}V_{max}[/tex]

[tex]\omega = 2\pi f[/tex]

## The Attempt at a Solution

I thought it was a simple solve for the values of omega, Vmax, and plug those into the first equation, but I am apparently wrong according to the website. I don't think I have messed up. The only other thing I can think of is that they want it in cosine instead of sine. I got the following answer:

Voutput = 255sin(566t)