- #1
gsmith12
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Homework Statement
By direct substitution, show that equation (3) is a solution of the differential equation (2).
Homework Equations
(2) (d^2 θ)/(dt^2 )=-g/l θ (Second derivative of θ(t)=-g/l θ.)
(3) θ(t)=θ_0 cos(√(g/l) t)
The Attempt at a Solution
I tried to integrate equation (2) and derive equation (3) but it didn't come out correctly.