3.665 \(\int \frac{\cos (x)}{a+b \sin (x)} \, dx\)

Optimal. Leaf size=11 \[ \frac{\log (a+b \sin (x))}{b} \]

[Out]

Log[a + b*Sin[x]]/b

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Rubi [A]  time = 0.0218965, antiderivative size = 11, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 2, integrand size = 11, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.182, Rules used = {2668, 31} \[ \frac{\log (a+b \sin (x))}{b} \]

Antiderivative was successfully verified.

[In]

Int[Cos[x]/(a + b*Sin[x]),x]

[Out]

Log[a + b*Sin[x]]/b

Rule 2668

Int[cos[(e_.) + (f_.)*(x_)]^(p_.)*((a_) + (b_.)*sin[(e_.) + (f_.)*(x_)])^(m_.), x_Symbol] :> Dist[1/(b^p*f), S
ubst[Int[(a + x)^m*(b^2 - x^2)^((p - 1)/2), x], x, b*Sin[e + f*x]], x] /; FreeQ[{a, b, e, f, m}, x] && Integer
Q[(p - 1)/2] && NeQ[a^2 - b^2, 0]

Rule 31

Int[((a_) + (b_.)*(x_))^(-1), x_Symbol] :> Simp[Log[RemoveContent[a + b*x, x]]/b, x] /; FreeQ[{a, b}, x]

Rubi steps

\begin{align*} \int \frac{\cos (x)}{a+b \sin (x)} \, dx &=\frac{\operatorname{Subst}\left (\int \frac{1}{a+x} \, dx,x,b \sin (x)\right )}{b}\\ &=\frac{\log (a+b \sin (x))}{b}\\ \end{align*}

Mathematica [A]  time = 0.0062776, size = 11, normalized size = 1. \[ \frac{\log (a+b \sin (x))}{b} \]

Antiderivative was successfully verified.

[In]

Integrate[Cos[x]/(a + b*Sin[x]),x]

[Out]

Log[a + b*Sin[x]]/b

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Maple [A]  time = 0.014, size = 12, normalized size = 1.1 \begin{align*}{\frac{\ln \left ( a+b\sin \left ( x \right ) \right ) }{b}} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(cos(x)/(a+b*sin(x)),x)

[Out]

ln(a+b*sin(x))/b

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Maxima [A]  time = 0.944746, size = 15, normalized size = 1.36 \begin{align*} \frac{\log \left (b \sin \left (x\right ) + a\right )}{b} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)/(a+b*sin(x)),x, algorithm="maxima")

[Out]

log(b*sin(x) + a)/b

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Fricas [A]  time = 2.07247, size = 28, normalized size = 2.55 \begin{align*} \frac{\log \left (b \sin \left (x\right ) + a\right )}{b} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)/(a+b*sin(x)),x, algorithm="fricas")

[Out]

log(b*sin(x) + a)/b

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Sympy [A]  time = 0.359504, size = 14, normalized size = 1.27 \begin{align*} \begin{cases} \frac{\log{\left (\frac{a}{b} + \sin{\left (x \right )} \right )}}{b} & \text{for}\: b \neq 0 \\\frac{\sin{\left (x \right )}}{a} & \text{otherwise} \end{cases} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)/(a+b*sin(x)),x)

[Out]

Piecewise((log(a/b + sin(x))/b, Ne(b, 0)), (sin(x)/a, True))

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Giac [A]  time = 1.09398, size = 16, normalized size = 1.45 \begin{align*} \frac{\log \left ({\left | b \sin \left (x\right ) + a \right |}\right )}{b} \end{align*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(cos(x)/(a+b*sin(x)),x, algorithm="giac")

[Out]

log(abs(b*sin(x) + a))/b