- #1

Coop

- 40

- 0

## Homework Statement

The voltage across a 60μF capacitor is described by the equation vC =(18 V) cos(200t), where t is in seconds.

What is the voltage across the capacitor at t =0.010 s?

## Homework Equations

N/A

## The Attempt at a Solution

When you use degrees the answer is 18V and when you use radians its -7.5 V (the correct answer). Can someone explain why you must use radians here? It's been a while since using these in math class so the simpler explanation the better if you wouldn't mind :) (maybe I am missing something obvious).

Thanks,

Cooper