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Evaluate : int ("cos 2x ")/(sqrt(1+ "...

Evaluate : `int ("cos 2x ")/(sqrt(1+ "sin" 2x))" dx "`

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`int ("cos 2x")/(sqrt(1+"sin" 2x)) " dx "`
`=int ("cos"^(2) x -" sin"^(2) x)/(sqrt("cos"^(2)x - " sin"^(2)x+2 "cos " x " sin " x)) " dx "`
` =int ("cos"^(2) x - " sin"^(2) x)/("cos" x+ " sin" x)" dx "`
`int "(cos x- sin x) dx "`
`=int " cos x dx -" int " sin x dx "`
`= " sin x+ cos x+ C "`
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