यदि ` veca ` और ` vecb ` असंरेख सदिश इस प्रकार है की ` x_1 veca +y_1vecb =x_2 veca +y_2 vecb ` तब सिद्ध कीजिए की ` x_1 =x_2` और ` y_1=y_2 `
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`” ” x_1 veca +y_1vecb =x_2 veca + y_2 vecb `
` rArr ” ” (x_1 -x2 ) veca + (y_1-y_2) vecb =0`
` rArr ” “x_1 =x_2 =0` और ` y_1 -y_2 =0,`
` ” ” [because veca ` और ` vecb ` असंरेख है]
`rArr ” ” x_1 =x_2 ` और ` y_1 = y_2 ” “` यही सिद्ध करना था|