Optimal. Leaf size=47 \[ -\frac {\sqrt {1-\left (a+b x^4\right )^2}}{4 b}+\frac {\left (a+b x^4\right ) \text {ArcCos}\left (a+b x^4\right )}{4 b} \]
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Rubi [A]
time = 0.04, antiderivative size = 47, normalized size of antiderivative = 1.00, number of steps
used = 4, number of rules used = 4, integrand size = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.333, Rules used = {6847, 4888,
4716, 267} \begin {gather*} \frac {\left (a+b x^4\right ) \text {ArcCos}\left (a+b x^4\right )}{4 b}-\frac {\sqrt {1-\left (a+b x^4\right )^2}}{4 b} \end {gather*}
Antiderivative was successfully verified.
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Rule 267
Rule 4716
Rule 4888
Rule 6847
Rubi steps
\begin {align*} \int x^3 \cos ^{-1}\left (a+b x^4\right ) \, dx &=\frac {1}{4} \text {Subst}\left (\int \cos ^{-1}(a+b x) \, dx,x,x^4\right )\\ &=\frac {\text {Subst}\left (\int \cos ^{-1}(x) \, dx,x,a+b x^4\right )}{4 b}\\ &=\frac {\left (a+b x^4\right ) \cos ^{-1}\left (a+b x^4\right )}{4 b}+\frac {\text {Subst}\left (\int \frac {x}{\sqrt {1-x^2}} \, dx,x,a+b x^4\right )}{4 b}\\ &=-\frac {\sqrt {1-\left (a+b x^4\right )^2}}{4 b}+\frac {\left (a+b x^4\right ) \cos ^{-1}\left (a+b x^4\right )}{4 b}\\ \end {align*}
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Mathematica [A]
time = 0.02, size = 43, normalized size = 0.91 \begin {gather*} \frac {-\sqrt {1-\left (a+b x^4\right )^2}+\left (a+b x^4\right ) \text {ArcCos}\left (a+b x^4\right )}{4 b} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.02, size = 40, normalized size = 0.85
method | result | size |
derivativedivides | \(\frac {\left (b \,x^{4}+a \right ) \arccos \left (b \,x^{4}+a \right )-\sqrt {1-\left (b \,x^{4}+a \right )^{2}}}{4 b}\) | \(40\) |
default | \(\frac {\left (b \,x^{4}+a \right ) \arccos \left (b \,x^{4}+a \right )-\sqrt {1-\left (b \,x^{4}+a \right )^{2}}}{4 b}\) | \(40\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.48, size = 39, normalized size = 0.83 \begin {gather*} \frac {{\left (b x^{4} + a\right )} \arccos \left (b x^{4} + a\right ) - \sqrt {-{\left (b x^{4} + a\right )}^{2} + 1}}{4 \, b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 1.51, size = 48, normalized size = 1.02 \begin {gather*} \frac {{\left (b x^{4} + a\right )} \arccos \left (b x^{4} + a\right ) - \sqrt {-b^{2} x^{8} - 2 \, a b x^{4} - a^{2} + 1}}{4 \, b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [A]
time = 0.20, size = 61, normalized size = 1.30 \begin {gather*} \begin {cases} \frac {a \operatorname {acos}{\left (a + b x^{4} \right )}}{4 b} + \frac {x^{4} \operatorname {acos}{\left (a + b x^{4} \right )}}{4} - \frac {\sqrt {- a^{2} - 2 a b x^{4} - b^{2} x^{8} + 1}}{4 b} & \text {for}\: b \neq 0 \\\frac {x^{4} \operatorname {acos}{\left (a \right )}}{4} & \text {otherwise} \end {cases} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 0.42, size = 39, normalized size = 0.83 \begin {gather*} \frac {{\left (b x^{4} + a\right )} \arccos \left (b x^{4} + a\right ) - \sqrt {-{\left (b x^{4} + a\right )}^{2} + 1}}{4 \, b} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.65, size = 99, normalized size = 2.11 \begin {gather*} \frac {x^4\,\mathrm {acos}\left (b\,x^4+a\right )}{4}-\frac {\sqrt {-a^2-2\,a\,b\,x^4-b^2\,x^8+1}}{4\,b}-\frac {a\,\ln \left (\sqrt {-a^2-2\,a\,b\,x^4-b^2\,x^8+1}-\frac {b^2\,x^4+a\,b}{\sqrt {-b^2}}\right )}{4\,\sqrt {-b^2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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