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1. |
The sides \[AB,BC,CD\] and \[DA\]of a quadrilateral are \[x+2y=3,\,x=1,\] \[x-3y=4,\,\] \[\,5x+y+12=0\] respectively.The angle between diagonals \[AC\]and \[BD\]is[Roorkee 1993] |
A. | \[{{45}^{o}}\] |
B. | \[{{60}^{o}}\] |
C. | \[{{90}^{o}}\] |
D. | \[{{30}^{o}}\] |
Answer» D. \[{{30}^{o}}\] | |