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If y = p sin3x + q cos 3x then which of the relation is true for the function

Answer (Detailed Solution Below)

Option 3 :
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Detailed Solution

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Concept:

Some useful formulas are:

Calculation:

y = p sin3x + q cos 3x

Differentiating the above equation we get,

Differentiating further we get,

 = -9y

∴ 

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