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सिद्ध कीजिए कि सदिशों 3 hati - 2hatj + h...

सिद्ध कीजिए कि सदिशों `3 hati - 2hatj + hatk, hati - 3hatj + 5 hatk " और " 2hati + hatj - 4 hatk `से बना त्रिभुज , समकोण त्रिभुज है ।

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