Integrand size = 13, antiderivative size = 30 \[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=-\arcsin \left (\frac {\cos (x)}{\sqrt {2}}\right )-\frac {1}{2} \cos (x) \sqrt {2-\cos ^2(x)} \]
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Time = 0.02 (sec) , antiderivative size = 30, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.231, Rules used = {3265, 201, 222} \[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=-\arcsin \left (\frac {\cos (x)}{\sqrt {2}}\right )-\frac {1}{2} \cos (x) \sqrt {2-\cos ^2(x)} \]
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Rule 201
Rule 222
Rule 3265
Rubi steps \begin{align*} \text {integral}& = -\text {Subst}\left (\int \sqrt {2-x^2} \, dx,x,\cos (x)\right ) \\ & = -\frac {1}{2} \cos (x) \sqrt {2-\cos ^2(x)}-\text {Subst}\left (\int \frac {1}{\sqrt {2-x^2}} \, dx,x,\cos (x)\right ) \\ & = -\arcsin \left (\frac {\cos (x)}{\sqrt {2}}\right )-\frac {1}{2} \cos (x) \sqrt {2-\cos ^2(x)} \\ \end{align*}
Result contains complex when optimal does not.
Time = 0.04 (sec) , antiderivative size = 53, normalized size of antiderivative = 1.77 \[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=-\frac {\cos (x) \sqrt {3-\cos (2 x)}}{2 \sqrt {2}}+i \log \left (i \sqrt {2} \cos (x)+\sqrt {3-\cos (2 x)}\right ) \]
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Time = 0.77 (sec) , antiderivative size = 51, normalized size of antiderivative = 1.70
method | result | size |
default | \(-\frac {\sqrt {\left (1+\sin ^{2}\left (x \right )\right ) \left (\cos ^{2}\left (x \right )\right )}\, \left (\arcsin \left (\cos ^{2}\left (x \right )-1\right )+\sqrt {-\left (\cos ^{4}\left (x \right )\right )+2 \left (\cos ^{2}\left (x \right )\right )}\right )}{2 \cos \left (x \right ) \sqrt {1+\sin ^{2}\left (x \right )}}\) | \(51\) |
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Leaf count of result is larger than twice the leaf count of optimal. 71 vs. \(2 (25) = 50\).
Time = 0.29 (sec) , antiderivative size = 71, normalized size of antiderivative = 2.37 \[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=-\frac {1}{2} \, \sqrt {-\cos \left (x\right )^{2} + 2} \cos \left (x\right ) + \frac {1}{2} \, \arctan \left (-\frac {\cos \left (x\right ) \sin \left (x\right ) - {\left (\cos \left (x\right )^{3} - \cos \left (x\right )\right )} \sqrt {-\cos \left (x\right )^{2} + 2}}{\cos \left (x\right )^{4} - 3 \, \cos \left (x\right )^{2} + 1}\right ) - \frac {1}{2} \, \arctan \left (\frac {\sin \left (x\right )}{\cos \left (x\right )}\right ) \]
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\[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=\int \sqrt {\sin ^{2}{\left (x \right )} + 1} \sin {\left (x \right )}\, dx \]
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none
Time = 0.37 (sec) , antiderivative size = 25, normalized size of antiderivative = 0.83 \[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=-\frac {1}{2} \, \sqrt {-\cos \left (x\right )^{2} + 2} \cos \left (x\right ) - \arcsin \left (\frac {1}{2} \, \sqrt {2} \cos \left (x\right )\right ) \]
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none
Time = 0.33 (sec) , antiderivative size = 25, normalized size of antiderivative = 0.83 \[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=-\frac {1}{2} \, \sqrt {-\cos \left (x\right )^{2} + 2} \cos \left (x\right ) - \arcsin \left (\frac {1}{2} \, \sqrt {2} \cos \left (x\right )\right ) \]
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Timed out. \[ \int \sin (x) \sqrt {1+\sin ^2(x)} \, dx=\int \sin \left (x\right )\,\sqrt {{\sin \left (x\right )}^2+1} \,d x \]
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