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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Alka gupta Best Answer
green theorem can not apply here....it is applicable only when M(x,y) and N(x,y) are continuous in closed curve C.... here curve is circle and both M and N are not continuous at (0,0) so that's why green theorem can not apply. this qus will solve by line integration just put x=sin thetha , y=cos thetha we get ans -2π
Thanks for writing Alka ma'am.