3.1.26 \(\int \cos (x) \sin (x) \, dx\) [26]

Optimal. Leaf size=8 \[ \frac {\sin ^2(x)}{2} \]

[Out]

1/2*sin(x)^2

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Rubi [A]
time = 0.00, antiderivative size = 8, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.400, Rules used = {2644, 30} \begin {gather*} \frac {\sin ^2(x)}{2} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Cos[x]*Sin[x],x]

[Out]

Sin[x]^2/2

Rule 30

Int[(x_)^(m_.), x_Symbol] :> Simp[x^(m + 1)/(m + 1), x] /; FreeQ[m, x] && NeQ[m, -1]

Rule 2644

Int[cos[(e_.) + (f_.)*(x_)]^(n_.)*((a_.)*sin[(e_.) + (f_.)*(x_)])^(m_.), x_Symbol] :> Dist[1/(a*f), Subst[Int[
x^m*(1 - x^2/a^2)^((n - 1)/2), x], x, a*Sin[e + f*x]], x] /; FreeQ[{a, e, f, m}, x] && IntegerQ[(n - 1)/2] &&
!(IntegerQ[(m - 1)/2] && LtQ[0, m, n])

Rubi steps

\begin {align*} \int \cos (x) \sin (x) \, dx &=\text {Subst}(\int x \, dx,x,\sin (x))\\ &=\frac {\sin ^2(x)}{2}\\ \end {align*}

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Mathematica [A]
time = 0.00, size = 8, normalized size = 1.00 \begin {gather*} -\frac {1}{2} \cos ^2(x) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Cos[x]*Sin[x],x]

[Out]

-1/2*Cos[x]^2

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Maple [A]
time = 0.01, size = 7, normalized size = 0.88

method	result	size
derivativedivides	\(\frac {\left (\sin ^{2}\left (x \right )\right )}{2}\)	\(7\)
default	\(\frac {\left (\sin ^{2}\left (x \right )\right )}{2}\)	\(7\)
risch	\(-\frac {\cos \left (2 x \right )}{4}\)	\(7\)
norman	\(\frac {2 \left (\tan ^{2}\left (\frac {x}{2}\right )\right )}{\left (1+\tan ^{2}\left (\frac {x}{2}\right )\right )^{2}}\)	\(19\)
meijerg	\(\frac {\sqrt {\pi }\, \left (\frac {1}{\sqrt {\pi }}-\frac {\cos \left (2 x \right )}{\sqrt {\pi }}\right )}{4}\)	\(19\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(x)*sin(x),x,method=_RETURNVERBOSE)

[Out]

1/2*sin(x)^2

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Maxima [A]
time = 4.40, size = 6, normalized size = 0.75 \begin {gather*} -\frac {1}{2} \, \cos \left (x\right )^{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)*sin(x),x, algorithm="maxima")

[Out]

-1/2*cos(x)^2

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Fricas [A]
time = 0.45, size = 6, normalized size = 0.75 \begin {gather*} -\frac {1}{2} \, \cos \left (x\right )^{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)*sin(x),x, algorithm="fricas")

[Out]

-1/2*cos(x)^2

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Sympy [A]
time = 0.02, size = 5, normalized size = 0.62 \begin {gather*} \frac {\sin ^{2}{\left (x \right )}}{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)*sin(x),x)

[Out]

sin(x)**2/2

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Giac [A]
time = 0.50, size = 6, normalized size = 0.75 \begin {gather*} -\frac {1}{2} \, \cos \left (x\right )^{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)*sin(x),x, algorithm="giac")

[Out]

-1/2*cos(x)^2

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Mupad [B]
time = 0.02, size = 6, normalized size = 0.75 \begin {gather*} \frac {{\sin \left (x\right )}^2}{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(x)*sin(x),x)

[Out]

sin(x)^2/2

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