document.write( "Question 1158465: if y =sqrt(cos x sqrt cos x sqrt (cos(x)* ....to ∞))), \r
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Algebra.Com's Answer #781411 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "if y = sqrt(cos(x) * sqrt (cos(x) * sqrt (cos(x)* ....to ∞))). \r
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document.write( "Square both sides.  You will get   \r\n" );
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document.write( "     = cos(x)*y.\r\n" );
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document.write( "Cancel \"y\" in both sides. You will get\r\n" );
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document.write( "    y = cos(x).\r\n" );
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document.write( "Take the derivative\r\n" );
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document.write( "    y' = -sin(x).\r\n" );
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document.write( "It is your answer.\r\n" );
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