यदि रेखा `overline(r) = (i - 2j + k) + lambda(2i + j + 2k)` समतल `overline(r). (3i - 2j + mk) = 4` के समान्तर हो तो m का मान ज्ञात कीजिए।

If theta is the between the line r = ( i + 2j- k) + lambda (i - j + 2k) , lambda in R and the plane r. (2i - j + k ) = 4. then a value of cos theta is :

The angle between the planes r. (2i - j + 2k) = 3 and r. (3i - 6j + 2k) = 4

The lines r = i + j - k + lambda (3i - j) and r = 4i - k + mu (2i + 3k) intersect at the point

The vectors 2i - 3j + k, I - 2j + 3k, 3i + j - 2k

If a = 3i - 2j + k, b = 2i - 4j - 3k, c = -i + 2j + 2k then a + b + c =