why we have squared and then added ??and how ???
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since he is asking cos^2(¤-Φ) so they are squaring and adding because then only it gets cancelled out
CocChamp26:
i understand squaring but what is the need of adding ??
because then only it come as sin^2¤+cos^2¤
but we needed cos^2(theta-null)
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kya maths bahut pasand he
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