document.write( "Question 1034293: \"%28sec%5E2%28%2212%B0%22%29-1%29tan%5E2%2878%29=1\" prove it? \n" ); document.write( "
Algebra.Com's Answer #648903 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
\"%28sec%5E2%28%2212%B0%22%29-1%29tan%5E2%2878%29=1\"
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document.write( "Use a Pythagorean identity\r\n" );
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document.write( "\"tan%5E2%28%2212%B0%22%29tan%5E2%28%2278%B0%22%29\"\r\n" );
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document.write( "\"tan%5E2%28%2245%B0%22-%2233%B0%22%29tan%5E2%28%2245%B0%22%2B%2233%B0%22%29\"\r\n" );
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document.write( "Use double-angle formula:\r\n" );
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document.write( "Use \"tan%28%2245%B0%22%29=1\"\r\n" );
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document.write( "\"1\"\r\n" );
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document.write( "Edwin
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