Problem

cos2(x+1)dx أوجد قِيمة التكامل

Answer

Expert–verified
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Answer

12(x+1+12sin(2(x+1)))+C

Steps

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

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