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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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1999
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Q)
The angle between two vectors $6 \hat{i} + 6 \hat{j} - 3 \hat {k} $ and $7 \hat{i} +4 \hat{j} + 4 \hat{k}$ is given by :
( A ) $\cos^{-1} (\frac{5}{\sqrt{3}})$
( B ) $\sin^{-1} (\frac{\sqrt{5}}{3})$
( C ) $\sin^{-1} (\frac{2}{\sqrt{3}})$
( D ) $\cos^{-1}(\frac{1}{\sqrt{3}})$
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