Find when and .

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

Find a⋅b\mathbf a \cdot \mathbf b when a=2i^−j^+3k^\mathbf a = 2\hat i - \hat j + 3\hat k and b=4i^+5j^−2k^\mathbf b = 4\hat i + 5\hat j - 2\hat k. (a) 1919 (b) 33 (c) −3-3 (d) 99

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