1.

In xy-plane, a straight line L_1 bisects the 1st quadrant and another straight line L_2 trisects the 2ndquadrantbeingclosertothe axisofy . TheacuteanglebetweenL_1 andL_2is

Answer»

`60^@`
`120^@`
`90^@`
`75^@`

ANSWER :D


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