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| 1. |
If the angle between line with d.cs (-(2)/(sqrt(21)), (a)/(sqrt(21)), (b)/(sqrt(21))) and other line with d.c ((3)/(sqrt(54)), (3)/(sqrt(54)), (-6)/(sqrt(54))) is 90^(0) then a pair of possible values of 'a' and 'b' respectively are |
| Answer» ANSWER :C | |