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JEE MATHEMATICS MCQ: DEFINITE INTEGRATION

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Analyzing +4 | -1

If

f\left( x \right) = \left| {\,\begin{array}{cccccccccccccccccccc} {\sin \,\,x\,\, + \,\,\sin \,\,2x\,\, + \,\,\sin \,\,3x}&{\sin \,\,2x}&{\sin \,\,3x}\\ {3\,\, + \,\,4\sin \,\,x}&3&{4\,\,\sin \,\,x}\\ {1\,\, + \,\,\sin \,\,x}&{\sin \,\,x}&1 \end{array}\,} \right|

, then the value of

\int \nolimits_0^{\pi /2} \,f\left( x \right)dx

is

View answer and explanation

Correct option: C

\frac{1}{3}

Option C (

\frac{1}{3}

) is correct because after simplifying the determinant, the resulting integral evaluates to

\frac{1}{3}

.

More Questions from DEFINITE INTEGRATION

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\int \nolimits_0^\infty \,\,\log \,\,\left( {x + \frac{1}{x}} \right)\,\,\frac{{dx}}{{1 + {x^2}}}

f\left( x \right)

is differentiable and

\int \nolimits_0^{{t^2}} \,\,x\;\,f\left( x \right)\,\,dx = \frac{2}{5}\,\,{t^5}

f\left( {\frac{4}{{25}}} \right)

equals The value of

\int\limits_{{0}}^{11}[x]^{3} . \mathrm{dx}

[*]

denotes the greatest integer function, is The integral

\int\limits_{2}^4 \frac{\log x^2}{\log x^2+\log \left(36-12 x+x^2\right)} d x

is equal to: The definite integral

\int\limits_{{-2}}^0\left(x^3+3 x^2+3 x+3+(x+1) \cos (x+1)\right) d x

I\,\,\left( {m,\,\,n} \right) = \int \nolimits_0^1 \,\,{t^m}\,\,{\left( {1 + t} \right)^n}\,\,dt

,then the expression for

I\left( {m,\,\,n} \right)

I\,\,\left( {m + 1,\,\,n + 1} \right)