Optimal. Leaf size=72 \[ \frac{\sin (e+f x) \sqrt{a+b \sin ^2(e+f x)}}{2 f}+\frac{a \tanh ^{-1}\left (\frac{\sqrt{b} \sin (e+f x)}{\sqrt{a+b \sin ^2(e+f x)}}\right )}{2 \sqrt{b} f} \]
[Out]
________________________________________________________________________________________
Rubi [A] time = 0.0547196, antiderivative size = 72, normalized size of antiderivative = 1., number of steps used = 4, number of rules used = 4, integrand size = 23, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.174, Rules used = {3190, 195, 217, 206} \[ \frac{\sin (e+f x) \sqrt{a+b \sin ^2(e+f x)}}{2 f}+\frac{a \tanh ^{-1}\left (\frac{\sqrt{b} \sin (e+f x)}{\sqrt{a+b \sin ^2(e+f x)}}\right )}{2 \sqrt{b} f} \]
Antiderivative was successfully verified.
[In]
[Out]
Rule 3190
Rule 195
Rule 217
Rule 206
Rubi steps
\begin{align*} \int \cos (e+f x) \sqrt{a+b \sin ^2(e+f x)} \, dx &=\frac{\operatorname{Subst}\left (\int \sqrt{a+b x^2} \, dx,x,\sin (e+f x)\right )}{f}\\ &=\frac{\sin (e+f x) \sqrt{a+b \sin ^2(e+f x)}}{2 f}+\frac{a \operatorname{Subst}\left (\int \frac{1}{\sqrt{a+b x^2}} \, dx,x,\sin (e+f x)\right )}{2 f}\\ &=\frac{\sin (e+f x) \sqrt{a+b \sin ^2(e+f x)}}{2 f}+\frac{a \operatorname{Subst}\left (\int \frac{1}{1-b x^2} \, dx,x,\frac{\sin (e+f x)}{\sqrt{a+b \sin ^2(e+f x)}}\right )}{2 f}\\ &=\frac{a \tanh ^{-1}\left (\frac{\sqrt{b} \sin (e+f x)}{\sqrt{a+b \sin ^2(e+f x)}}\right )}{2 \sqrt{b} f}+\frac{\sin (e+f x) \sqrt{a+b \sin ^2(e+f x)}}{2 f}\\ \end{align*}
Mathematica [A] time = 0.271186, size = 96, normalized size = 1.33 \[ \frac{a^{3/2} \sqrt{\frac{b \sin ^2(e+f x)}{a}+1} \sinh ^{-1}\left (\frac{\sqrt{b} \sin (e+f x)}{\sqrt{a}}\right )+\sqrt{b} \sin (e+f x) \left (a+b \sin ^2(e+f x)\right )}{2 \sqrt{b} f \sqrt{a+b \sin ^2(e+f x)}} \]
Antiderivative was successfully verified.
[In]
[Out]
________________________________________________________________________________________
Maple [A] time = 0.088, size = 62, normalized size = 0.9 \begin{align*}{\frac{\sin \left ( fx+e \right ) }{2\,f}\sqrt{a+b \left ( \sin \left ( fx+e \right ) \right ) ^{2}}}+{\frac{a}{2\,f}\ln \left ( \sin \left ( fx+e \right ) \sqrt{b}+\sqrt{a+b \left ( \sin \left ( fx+e \right ) \right ) ^{2}} \right ){\frac{1}{\sqrt{b}}}} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Maxima [F(-2)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Exception raised: ValueError} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Fricas [B] time = 2.82302, size = 1106, normalized size = 15.36 \begin{align*} \left [\frac{a \sqrt{b} \log \left (128 \, b^{4} \cos \left (f x + e\right )^{8} - 256 \,{\left (a b^{3} + 2 \, b^{4}\right )} \cos \left (f x + e\right )^{6} + 32 \,{\left (5 \, a^{2} b^{2} + 24 \, a b^{3} + 24 \, b^{4}\right )} \cos \left (f x + e\right )^{4} + a^{4} + 32 \, a^{3} b + 160 \, a^{2} b^{2} + 256 \, a b^{3} + 128 \, b^{4} - 32 \,{\left (a^{3} b + 10 \, a^{2} b^{2} + 24 \, a b^{3} + 16 \, b^{4}\right )} \cos \left (f x + e\right )^{2} - 8 \,{\left (16 \, b^{3} \cos \left (f x + e\right )^{6} - 24 \,{\left (a b^{2} + 2 \, b^{3}\right )} \cos \left (f x + e\right )^{4} - a^{3} - 10 \, a^{2} b - 24 \, a b^{2} - 16 \, b^{3} + 2 \,{\left (5 \, a^{2} b + 24 \, a b^{2} + 24 \, b^{3}\right )} \cos \left (f x + e\right )^{2}\right )} \sqrt{-b \cos \left (f x + e\right )^{2} + a + b} \sqrt{b} \sin \left (f x + e\right )\right ) + 8 \, \sqrt{-b \cos \left (f x + e\right )^{2} + a + b} b \sin \left (f x + e\right )}{16 \, b f}, -\frac{a \sqrt{-b} \arctan \left (\frac{{\left (8 \, b^{2} \cos \left (f x + e\right )^{4} - 8 \,{\left (a b + 2 \, b^{2}\right )} \cos \left (f x + e\right )^{2} + a^{2} + 8 \, a b + 8 \, b^{2}\right )} \sqrt{-b \cos \left (f x + e\right )^{2} + a + b} \sqrt{-b}}{4 \,{\left (2 \, b^{3} \cos \left (f x + e\right )^{4} + a^{2} b + 3 \, a b^{2} + 2 \, b^{3} -{\left (3 \, a b^{2} + 4 \, b^{3}\right )} \cos \left (f x + e\right )^{2}\right )} \sin \left (f x + e\right )}\right ) - 4 \, \sqrt{-b \cos \left (f x + e\right )^{2} + a + b} b \sin \left (f x + e\right )}{8 \, b f}\right ] \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Sympy [F(-1)] time = 0., size = 0, normalized size = 0. \begin{align*} \text{Timed out} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]
________________________________________________________________________________________
Giac [A] time = 1.18914, size = 88, normalized size = 1.22 \begin{align*} -\frac{\frac{a \log \left ({\left | -\sqrt{b} \sin \left (f x + e\right ) + \sqrt{b \sin \left (f x + e\right )^{2} + a} \right |}\right )}{\sqrt{b}} - \sqrt{b \sin \left (f x + e\right )^{2} + a} \sin \left (f x + e\right )}{2 \, f} \end{align*}
Verification of antiderivative is not currently implemented for this CAS.
[In]
[Out]