ok re...
yaar, ur drawing is wrong, ill show u the right 1.
in my diagram, the 4 sections show north East(+,+) , North West(-,+) , South East(+,-) , South West(-,-).
as the question says the wind
appears to be blowing
from north east, means that the wind is
coming from (+,+) 'B'. stress on this line again
and at the same time the boy is traveling south at 'A'.
centre = 0
now the relative velocity of '0A' and 'BA' = 'B0' therefore the the angle B0A is 135
0 and angle 0AB is not..
tu hi soch, itna chota angle in ur drawin, how can it be 135
0i hope this was clear.