3.2.4 \(\int \cos (x) \cot (x) \, dx\) [104]

Optimal. Leaf size=8 \[ -\tanh ^{-1}(\cos (x))+\cos (x) \]

[Out]

-arctanh(cos(x))+cos(x)

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Rubi [A]
time = 0.01, antiderivative size = 8, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 5, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.600, Rules used = {2672, 327, 212} \begin {gather*} \cos (x)-\tanh ^{-1}(\cos (x)) \end {gather*}

Antiderivative was successfully verified.

[In]

Int[Cos[x]*Cot[x],x]

[Out]

-ArcTanh[Cos[x]] + Cos[x]

Rule 212

Int[((a_) + (b_.)*(x_)^2)^(-1), x_Symbol] :> Simp[(1/(Rt[a, 2]*Rt[-b, 2]))*ArcTanh[Rt[-b, 2]*(x/Rt[a, 2])], x]
/; FreeQ[{a, b}, x] && NegQ[a/b] && (GtQ[a, 0] || LtQ[b, 0])

Rule 327

Int[((c_.)*(x_))^(m_)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Simp[c^(n - 1)*(c*x)^(m - n + 1)*((a + b*x^n
)^(p + 1)/(b*(m + n*p + 1))), x] - Dist[a*c^n*((m - n + 1)/(b*(m + n*p + 1))), Int[(c*x)^(m - n)*(a + b*x^n)^p
, x], x] /; FreeQ[{a, b, c, p}, x] && IGtQ[n, 0] && GtQ[m, n - 1] && NeQ[m + n*p + 1, 0] && IntBinomialQ[a, b,
c, n, m, p, x]

Rule 2672

Int[((a_.)*sin[(e_.) + (f_.)*(x_)])^(m_.)*tan[(e_.) + (f_.)*(x_)]^(n_.), x_Symbol] :> With[{ff = FreeFactors[S
in[e + f*x], x]}, Dist[ff/f, Subst[Int[(ff*x)^(m + n)/(a^2 - ff^2*x^2)^((n + 1)/2), x], x, a*(Sin[e + f*x]/ff)
], x]] /; FreeQ[{a, e, f, m}, x] && IntegerQ[(n + 1)/2]

Rubi steps

\begin {align*} \int \cos (x) \cot (x) \, dx &=-\text {Subst}\left (\int \frac {x^2}{1-x^2} \, dx,x,\cos (x)\right )\\ &=\cos (x)-\text {Subst}\left (\int \frac {1}{1-x^2} \, dx,x,\cos (x)\right )\\ &=-\tanh ^{-1}(\cos (x))+\cos (x)\\ \end {align*}

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Mathematica [B] Leaf count is larger than twice the leaf count of optimal. \(19\) vs. \(2(8)=16\).
time = 0.00, size = 19, normalized size = 2.38 \begin {gather*} \cos (x)-\log \left (\cos \left (\frac {x}{2}\right )\right )+\log \left (\sin \left (\frac {x}{2}\right )\right ) \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[Cos[x]*Cot[x],x]

[Out]

Cos[x] - Log[Cos[x/2]] + Log[Sin[x/2]]

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Mathics [B] Leaf count is larger than twice the leaf count of optimal. \(21\) vs. \(2(8)=16\).
time = 1.84, size = 17, normalized size = 2.12 \begin {gather*} \text {Cos}\left [x\right ]-\frac {\text {Log}\left [1+\text {Cos}\left [x\right ]\right ]}{2}+\frac {\text {Log}\left [-1+\text {Cos}\left [x\right ]\right ]}{2} \end {gather*}

Antiderivative was successfully verified.

[In]

mathics('Integrate[Cos[x]^2/Sin[x],x]')

[Out]

Cos[x] - Log[1 + Cos[x]] / 2 + Log[-1 + Cos[x]] / 2

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Maple [A]
time = 0.03, size = 12, normalized size = 1.50

method	result	size
default	\(\cos \left (x \right )+\ln \left (\csc \left (x \right )-\cot \left (x \right )\right )\)	\(12\)
norman	\(\frac {2}{1+\tan ^{2}\left (\frac {x}{2}\right )}+\ln \left (\tan \left (\frac {x}{2}\right )\right )\)	\(19\)
risch	\(\frac {{\mathrm e}^{i x}}{2}+\frac {{\mathrm e}^{-i x}}{2}-\ln \left (1+{\mathrm e}^{i x}\right )+\ln \left ({\mathrm e}^{i x}-1\right )\)	\(34\)

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(x)^2/sin(x),x,method=_RETURNVERBOSE)

[Out]

cos(x)+ln(csc(x)-cot(x))

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Maxima [B] Leaf count of result is larger than twice the leaf count of optimal. 17 vs. \(2 (8) = 16\).
time = 0.26, size = 17, normalized size = 2.12 \begin {gather*} \cos \left (x\right ) - \frac {1}{2} \, \log \left (\cos \left (x\right ) + 1\right ) + \frac {1}{2} \, \log \left (\cos \left (x\right ) - 1\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)^2/sin(x),x, algorithm="maxima")

[Out]

cos(x) - 1/2*log(cos(x) + 1) + 1/2*log(cos(x) - 1)

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Fricas [B] Leaf count of result is larger than twice the leaf count of optimal. 21 vs. \(2 (8) = 16\).
time = 0.35, size = 21, normalized size = 2.62 \begin {gather*} \cos \left (x\right ) - \frac {1}{2} \, \log \left (\frac {1}{2} \, \cos \left (x\right ) + \frac {1}{2}\right ) + \frac {1}{2} \, \log \left (-\frac {1}{2} \, \cos \left (x\right ) + \frac {1}{2}\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)^2/sin(x),x, algorithm="fricas")

[Out]

cos(x) - 1/2*log(1/2*cos(x) + 1/2) + 1/2*log(-1/2*cos(x) + 1/2)

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Sympy [B] Leaf count of result is larger than twice the leaf count of optimal. 19 vs. \(2 (7) = 14\)
time = 0.05, size = 19, normalized size = 2.38 \begin {gather*} \frac {\log {\left (\cos {\left (x \right )} - 1 \right )}}{2} - \frac {\log {\left (\cos {\left (x \right )} + 1 \right )}}{2} + \cos {\left (x \right )} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)**2/sin(x),x)

[Out]

log(cos(x) - 1)/2 - log(cos(x) + 1)/2 + cos(x)

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Giac [B] Leaf count of result is larger than twice the leaf count of optimal. 19 vs. \(2 (8) = 16\).
time = 0.00, size = 21, normalized size = 2.62 \begin {gather*} \cos x+\frac {\ln \left (-\cos x+1\right )}{2}-\frac {\ln \left (\cos x+1\right )}{2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)^2/sin(x),x)

[Out]

cos(x) - 1/2*log(cos(x) + 1) + 1/2*log(-cos(x) + 1)

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Mupad [B]
time = 0.15, size = 8, normalized size = 1.00 \begin {gather*} \ln \left (\mathrm {tan}\left (\frac {x}{2}\right )\right )+\cos \left (x\right ) \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(x)^2/sin(x),x)

[Out]

log(tan(x/2)) + cos(x)

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