### Integrals with Inverse Trig Functions 1

Worked problem in calculus. The indefinite integrals int 1/[4 + (x+2)^2] dx and int dx/sqrt(-4x-x^2) are calculated. The first integral uses the rule int du/(1+u^2) = tan^(-1) (u) + C. The second integral uses completing the square and the rule int du/sqrt(1-u^2).

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