∫cos2(x+1)dx أوجد قِيمة التكامل
12(x+1+12sin(2(x+1)))+C
Step 1 :u=x+1
Step 2 :du=dx
Step 3 :∫cos2(u)du
Step 4 :Using the double angle formula: cos2(u)=1+cos(2u)2
Step 5 :∫1+cos(2u)2du
Step 6 :12∫(1+cos(2u))du
Step 7 :12(∫1du+∫cos(2u)du)
Step 8 :12(u+12sin(2u))+C
Step 9 :Substitute back: 12(x+1+12sin(2(x+1)))+C
Step 10 :12(x+1+12sin(2(x+1)))+C