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Show that the following vector are co-planar. hati-2hatj+2hatk, 3hati+4hatj+5hatk, -2hati+4hatj-4hatk. |
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Answer» Solution :Let `VECA = hati-2hatj+2hatk` `vecb = 3hati+4hatj+5hatk` `vecc = -2hati+4hatj-4hatk` The vectors `veca.vecb.vecc` are coplanar if `(VECAXXVECB).vecc = 0` HENCE as `(vecaxxvecb).vecc = 0 the GIVEN vectors are coplanar. |
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