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If veca xx vecb + vecb xx vecc + vecc xx...

If `veca xx vecb + vecb xx vecc + vecc xx veca = 0`. Show that the vectors `veca, vecb, vecc` are coplanar.

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UNITED BOOK HOUSE-MISCELLANEOUS EXERCISE-EXERCISE
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  14. The vector vecr is collinear with vector vecn = 2hati + hatj + 3hatk ...

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  15. If veca,vecb and vecc are three mutually perpendicular vectors of equa...

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