નિશ્ચિત સંકલનનું મૂલ્ય શોધો: $\int_0^{\pi /2} \cos^2 x \, dx$

  • A
    $\frac{\pi}{4}$
  • B
    $\frac{\pi}{2}$
  • C
    $\frac{\pi}{8}$
  • D
    $\frac{\pi}{6}$

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$\int_0^{\frac{\pi}{4}} x \sec^2 x \, dx =$

ધારો કે $\int_0^1 f(x) \, dx = 1$,$\int_0^1 x f(x) \, dx = a$,અને $\int_0^1 x^2 f(x) \, dx = a^2$ છે. તો $\int_0^1 (x - a)^2 f(x) \, dx$ નું મૂલ્ય શોધો.

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