Integrand size = 10, antiderivative size = 38 \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=a x+\frac {b (c+d x) \cot ^{-1}(c+d x)}{d}+\frac {b \log \left (1+(c+d x)^2\right )}{2 d} \]
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Time = 0.02 (sec) , antiderivative size = 38, normalized size of antiderivative = 1.00, number of steps used = 4, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.300, Rules used = {5148, 4931, 266} \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=a x+\frac {b \log \left ((c+d x)^2+1\right )}{2 d}+\frac {b (c+d x) \cot ^{-1}(c+d x)}{d} \]
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Rule 266
Rule 4931
Rule 5148
Rubi steps \begin{align*} \text {integral}& = a x+b \int \cot ^{-1}(c+d x) \, dx \\ & = a x+\frac {b \text {Subst}\left (\int \cot ^{-1}(x) \, dx,x,c+d x\right )}{d} \\ & = a x+\frac {b (c+d x) \cot ^{-1}(c+d x)}{d}+\frac {b \text {Subst}\left (\int \frac {x}{1+x^2} \, dx,x,c+d x\right )}{d} \\ & = a x+\frac {b (c+d x) \cot ^{-1}(c+d x)}{d}+\frac {b \log \left (1+(c+d x)^2\right )}{2 d} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 49, normalized size of antiderivative = 1.29 \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=a x+b x \cot ^{-1}(c+d x)+\frac {b \left (-2 c \arctan (c+d x)+\log \left (1+c^2+2 c d x+d^2 x^2\right )\right )}{2 d} \]
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Time = 0.30 (sec) , antiderivative size = 35, normalized size of antiderivative = 0.92
method | result | size |
default | \(a x +\frac {b \left (\operatorname {arccot}\left (d x +c \right ) \left (d x +c \right )+\frac {\ln \left (1+\left (d x +c \right )^{2}\right )}{2}\right )}{d}\) | \(35\) |
parts | \(a x +\frac {b \left (\operatorname {arccot}\left (d x +c \right ) \left (d x +c \right )+\frac {\ln \left (1+\left (d x +c \right )^{2}\right )}{2}\right )}{d}\) | \(35\) |
derivativedivides | \(\frac {\left (d x +c \right ) a +b \left (\operatorname {arccot}\left (d x +c \right ) \left (d x +c \right )+\frac {\ln \left (1+\left (d x +c \right )^{2}\right )}{2}\right )}{d}\) | \(40\) |
parallelrisch | \(\frac {b \left (2 x \,\operatorname {arccot}\left (d x +c \right ) d^{2}+2 c \,\operatorname {arccot}\left (d x +c \right ) d +\ln \left (d^{2} x^{2}+2 c d x +c^{2}+1\right ) d \right )}{2 d^{2}}+a x\) | \(54\) |
risch | \(a x +\frac {i b x \ln \left (1+i \left (d x +c \right )\right )}{2}-\frac {i b x \ln \left (1-i \left (d x +c \right )\right )}{2}+\frac {\pi b x}{2}-\frac {b c \arctan \left (d x +c \right )}{d}+\frac {b \ln \left (d^{2} x^{2}+2 c d x +c^{2}+1\right )}{2 d}\) | \(79\) |
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Time = 0.27 (sec) , antiderivative size = 52, normalized size of antiderivative = 1.37 \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=\frac {2 \, b d x \operatorname {arccot}\left (d x + c\right ) + 2 \, a d x - 2 \, b c \arctan \left (d x + c\right ) + b \log \left (d^{2} x^{2} + 2 \, c d x + c^{2} + 1\right )}{2 \, d} \]
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Time = 0.16 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.34 \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=a x + b \left (\begin {cases} \frac {c \operatorname {acot}{\left (c + d x \right )}}{d} + x \operatorname {acot}{\left (c + d x \right )} + \frac {\log {\left (c^{2} + 2 c d x + d^{2} x^{2} + 1 \right )}}{2 d} & \text {for}\: d \neq 0 \\x \operatorname {acot}{\left (c \right )} & \text {otherwise} \end {cases}\right ) \]
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Time = 0.18 (sec) , antiderivative size = 34, normalized size of antiderivative = 0.89 \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=a x + \frac {{\left (2 \, {\left (d x + c\right )} \operatorname {arccot}\left (d x + c\right ) + \log \left ({\left (d x + c\right )}^{2} + 1\right )\right )} b}{2 \, d} \]
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Leaf count of result is larger than twice the leaf count of optimal. 116 vs. \(2 (36) = 72\).
Time = 0.32 (sec) , antiderivative size = 116, normalized size of antiderivative = 3.05 \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=a x - \frac {{\left (\arctan \left (\frac {1}{d x + c}\right ) \tan \left (\frac {1}{2} \, \arctan \left (\frac {1}{d x + c}\right )\right )^{2} + \log \left (\frac {16 \, \tan \left (\frac {1}{2} \, \arctan \left (\frac {1}{d x + c}\right )\right )^{2}}{\tan \left (\frac {1}{2} \, \arctan \left (\frac {1}{d x + c}\right )\right )^{4} + 2 \, \tan \left (\frac {1}{2} \, \arctan \left (\frac {1}{d x + c}\right )\right )^{2} + 1}\right ) \tan \left (\frac {1}{2} \, \arctan \left (\frac {1}{d x + c}\right )\right ) - \arctan \left (\frac {1}{d x + c}\right )\right )} b}{2 \, d \tan \left (\frac {1}{2} \, \arctan \left (\frac {1}{d x + c}\right )\right )} \]
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Time = 1.50 (sec) , antiderivative size = 48, normalized size of antiderivative = 1.26 \[ \int \left (a+b \cot ^{-1}(c+d x)\right ) \, dx=a\,x+\frac {\frac {b\,\ln \left (c^2+2\,c\,d\,x+d^2\,x^2+1\right )}{2}+b\,c\,\mathrm {acot}\left (c+d\,x\right )}{d}+b\,x\,\mathrm {acot}\left (c+d\,x\right ) \]
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