Integral of cos(x)cos(2x)cos(3x) dx

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Integral of cos(x)cos(2x)cos(3x) dx

#calculus #integral #integrals #integration #integrationbysubstitution

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With out voice you explained clearly sir

horrerroom
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nice, even without an explanation, you could understand it as long as you know trig identities :>

jumisansu