- #1
Physicsrapper
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Find the value of the integral:
a) ∫0π(sinx + 2)dx
Formula I found:
sin x dx = -cos x + C
My calculation: F(x) = -cosx + 2x
=> (-cosπ + 2π)-(-cos0) = -1 + 2π + 1 = 2π , but the solution should be 2π +2
b) ∫02πsin(x/2)dx
My calculation: F(x) = -cosx/2
=> -cosπ + cos0 = 0 ; but the solution should be 4
What did I wrong in those equations? Can anyone help?
a) ∫0π(sinx + 2)dx
Formula I found:
My calculation: F(x) = -cosx + 2x
=> (-cosπ + 2π)-(-cos0) = -1 + 2π + 1 = 2π , but the solution should be 2π +2
b) ∫02πsin(x/2)dx
My calculation: F(x) = -cosx/2
=> -cosπ + cos0 = 0 ; but the solution should be 4
What did I wrong in those equations? Can anyone help?