# calculus

the equation y+y"=0 is the differential equation of?
a.)sine function
b.)sinusoidal
c.)cosine function
d.) a and c
e.) abc

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2. 👎 0
3. 👁 190
1. sine or cosine, since

(sin x)" = -sin x
(cos x)" = -cos x

So, (D)

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2. 👎 0

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