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प्रश्न
Find an anti derivative (or integral) of the following function by the method of inspection.
Cos 3x
उत्तर
We know that,
`d/dx` sin 3x = 3 cos 3x
or cos 3x = `d/dx(1/3 sin 3x)`
Hence, the antiderivative of cos 3x is `1/3` sin 3x.
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