- #1

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## Homework Statement

http://i.imgur.com/TZcJkjH.jpg

Find the phase constant

## Homework Equations

x(t) = Acos(wt + Φ)

x(t) = Asin(wt + Φ)

w = 2pi/T

## The Attempt at a Solution

I see A = 20cm. T = 4s. f = 1/4 = 0.25Hz. w = 2pi/4 = 1.57Hz.

10 = 20cosΦ

0.5 = cosΦ

Φ = π/3, 5.24?