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( vec A = 2 hat i - hat j + hat k ; ) ( vec B = hat i + 2 hat j + 2 hat k ) হলে- ( vec A cdot vec B = 2 ) ( left | vec B right | = 3 ) ( vec B ) বরাবর ( vec A ) এর লম্ব অভিক্ষেপ = | Suva Ai