Physics · Vectors
मान लीजिए कि a, b, और c समान परिमाण के तीन परस्पर लंबवत सदिश हैं, जो सदिश (a + b + c) के साथ समान कोण θ पर झुके हुए हैं। तो 36 cos2(2θ) का मान किसके बराबर है?
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