1.

(D) π4. Acar Ale gving noth cest o 80her car B gg outh coet with a vey0 var Theveloolty d A relative to B makes an angde with the tnorth equal to75. Ahos

Answer»

A and B make the base and the height of a right-triangle, of which the hypotenuse is sqrt(8²+6²)v or 10 kmphThe resultant is 10 at an angle 53.13 degree to BA or B are angled to the N-E and N-S, or at 45 deg. to the vertical axis, hence the resultant is at 53.13-45 or 8.13 degree to vertical axis.

tanθ for 8.13 degree = 0.14285714285714

and the same value is tan^-1(1/7) . option D.



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