two sides of a triangle represents two vectors 2i+3j+4k and 4i+3j+5k area of triangle is 1)9\sqrt2 ; 2)9\sqrt3 ; 3) 9/2 ; 4) 9\sqrt3/2

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3 i + 4 j + 5 k, 4 i - 3 j - 5 k

7 i + j

2 \to i - \to j + \to k, \to i - 3 \to j - 5 \to k, - 3 \to i + 4 \to j + 4 \to k

(4 ¯ i + 3 ¯ j + 4 ¯ ¯ ¯ k)

5 ¯ i

\vec{a} = 3 \hat{i} - 2 \hat{j} + \hat{k}, \vec{b} = \hat{i} - 3 \hat{j} + 5 \hat{k}, \vec{c} = 2 \hat{i} + \hat{j} - 4 \hat{k}

\vec{a} = 4 \hat{i} - 3 \hat{j} + \hat{k}, \vec{b} = 2 \hat{i} - 4 \hat{j} + 5 \hat{k}, \vec{c} = \hat{i} - \hat{j}

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