Indefinite integrals (or antiderivatives) are really just backward differentiation. Therefore, the indefinite integral of eˣ is eˣ+c, the indefinite integral of 1/x is ln(x)+c, the indefinite integral of sin(x) is -cos(x)+c, and the indefinite integral of cos(x) is sin(x)+c.
6431_Antiderivative_of_x_1.html
6433_Finding_the_constant_of_integration_exponential_function.html
6432_Finding_the_constant_of_integration_rational_function.html
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