document.write( "Question 1130046: Trigonometry
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Algebra.Com's Answer #746717 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
The inverse cosine is taken in QI and QII between 0 and p.\r
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document.write( "\"%22%22=%22%22\"\"pi%2F2\"\r
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document.write( "First find:\r
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document.write( "\"%22%22=%22%22\"\"-1%2F2\"\r
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document.write( "Then\r
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document.write( "\"%22cos%22%5E%28-1%29\"\"%28cos%284pi%2F3%29%5E%22%22%29\"\"%22%22=%22%22\"\"%22cos%22%5E%28-1%29\"\"-1%2F2\"\"%22%22=%22%22\"\"2pi%2F3\"\r
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document.write( "--------------------------------------------------------\r
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document.write( "\"expr%28cos%28x%29%2Fsin%28x%29%29%2A%28tan%28x%29%5E%22%22+%2B+cos%28x%29%29\" \r
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document.write( "Distribute\r
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document.write( "\r
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document.write( "\"1%2B+cos%5E2%28x%29%2Fsin%5E%22%22%28x%29\"\r
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document.write( "\"1%2B+%281-sin%5E2%28x%29%29%2Fsin%5E%22%22%28x%29\"\r
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document.write( "\n" );
document.write( "\"1%2B+1%2Fsin%28x%29-sin%5E2%28x%29%2Fsin%5E%22%22%28x%29\"\r
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document.write( "\"1%2B+csc%28x%29-sin%5Ecross%282%29%28x%29%2Fcross%28sin%5E%22%22%28x%29%29\"\r
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document.write( "\"1%2Bcsc%28x%29-sin%28x%29\"\r
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document.write( "-----------------------------------\r
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document.write( "\n" );
document.write( "\"%28sin%5E2%28x%29%5E%22%22%5E%22%22+-+1%29%2A%28tan%5E2%28x%29%5E%22%22%5E%22%22+-+1%29\"\r
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document.write( "\n" );
document.write( "\"%28-1%2Bsin%5E2%28x%29%5E%22%22%5E%22%22%29%2A%28tan%5E2%28x%29%5E%22%22%5E%22%22+-+1%29\"\r
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document.write( "\n" );
document.write( "\"-1%281-sin%5E2%28x%29%5E%22%22%5E%22%22%29%2A%28tan%5E2%28x%29%5E%22%22%5E%22%22+-+1%29\"\r
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document.write( "\"-1%28cos%5E2%28x%29%5E%22%22%5E%22%22%29%2A%28tan%5E2%28x%29%5E%22%22%5E%22%22+-+1%29\"\r
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document.write( "\n" );
document.write( "\"-cos%5E2%28x%29%28tan%5E2%28x%29%5E%22%22%5E%22%22+-+1%29\"\r
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document.write( "\n" );
document.write( "\"-cos%5E2%28x%29%28sin%5E2%28x%29%2Fcos%5E2%28x%29+-+1%29\"\r
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document.write( "Distribute:\r
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document.write( "\"-cos%5E2%28x%29expr%28sin%5E2%28x%29%2Fcos%5E2%28x%29%29+%2B+cos%5E2%28x%29\"\r
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document.write( "\"-sin%5E2%28x%29%2Bcos%5E2%28x%29\"\r
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document.write( "\n" );
document.write( "\"cos%5E2%28x%29-sin%5E2%28x%29\"\r
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document.write( "\"cos%282x%29\"\r
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document.write( "Edwin
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