document.write( "Question 597015: what is Cos^-1square root of 2/3 using a calculator?? my book says the answer is 1.08 but i keep getting .62. what am i doing wrong? \n" ); document.write( "
Algebra.Com's Answer #377983 by AnlytcPhil(1806)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "I see what you did. On your calculator, you typed this:\r\n" );
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document.write( "cos-1(Ö(2/3))\r\n" );
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document.write( "and got .6154797087\r\n" );
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document.write( "when you should have typed this instead:\r\n" );
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document.write( "cos-1(Ö(2)/3)\r\n" );
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document.write( "and gotten 1.079913649\r\n" );
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document.write( "It's \"the square root of two\" divided by three,\r\n" );
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document.write( "NOT \"the square root of two-thirds\"\r\n" );
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document.write( "Edwin
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