document.write( "Question 946989: prove each identity
\n" ); document.write( "tanθ -1 = sin^2θ-cos^2θ/ sinθcosθ+cos^2θ
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Algebra.Com's Answer #577749 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "\"tan%28theta%29+-1+=+%28sin%28theta%29-cos%28theta%29%29%2F+cos%28theta%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"tan%28theta%29+-1+=+sin%28theta%29%2F+cos%28theta%29-cos%28theta%29%2F+cos%28theta%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"tan%28theta%29+-1+=+tan%28theta%29+-1\"\r
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