write down the expansion of cos 5 theta , try hard , easy solving method , trigonometry

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We can aslo solve by expanding cos5θ= cos(2θ + cos3θ) and using the formulas of cos2θ and cos3θ

harsh_patley_
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Cos 8 theta expansion plz post on video

gokulpalani
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Ithumathiri sin6 theta video podunga sir please

SivasakthiS-kg