Grade 12th passIntegral Calculusintegral one divided by 1+cosxlimits are 0 to pie/4 Ranga Manchikanti 9 Years agoGrade 12th pass
Arijit9 Years ago1/1+cosx=1/(1+2cos2x/2-1)=1/2sec2x/2 let tan(x/2)=ztake diff at both sides½ sec2x/2dx=dznow∫0(pi/4)dz=[z]0(pi/4)=[tan(x/2)]0(pi/4)=tan(pi/8)