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Evaluate: int(cos2x)/(sqrt(sin^2 2x+8))\...

Evaluate: `int(cos2x)/(sqrt(sin^2 2x+8))\ dx`

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I=`int(cos2x)/(sqrt(sin^2 2x+8))\ dx`
`I=1/2int(2cos2x)/(sqrt(sin^2 2x+8))\ dx`
`I=1/2​log∣(sin^2x)+sqrt(sin^2(2x)+8 )​∣+c`
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