हिंदी

Evaluate: π∫0π2sin8x dx -

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प्रश्न

Evaluate:

`int_0^(π/2) sin^8x  dx`

योग

उत्तर

`int_0^(π/2) sin^8x  dx`

Reduction formula:

`int_0^(π/2) sin^nx  dx = ((n - 1)(n - 3)......(1))/(n(n - 2)......(2))*π/2`

∴ `int_0^(π/2) sin^8x  dx = ((7)(5)(3)(1))/((8)(6)(4)(2))*π/2`

= `(35π)/256`

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Methods of Evaluation and Properties of Definite Integral
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