document.write( "Question 1151397: If 0\n" ); document.write( "
Algebra.Com's Answer #773144 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Draw the two right triangles congruent. \r\n" );
document.write( "The angle indicated by the counter-clockwise red arc is A.\r\n" );
document.write( "The angle indicated by the clockwise green arc is A-180°.\r\n" );
document.write( "The values of x and y are positive, and r is ALWAYS taken positive.\r\n" );
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document.write( "\"sec%28A-180%5Eo%29=%22%2Br%22%2F%28-x%29=-r%2Fx\"\r\n" );
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document.write( "\"sec%28A%29=%22%2Br%22%2F%22%2Bx%22=%22%22%2Br%2Fx\" \r\n" );
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document.write( "So \"sec%28A-180%5Eo%29=-sec%28A%29\" proved geometrically.\r\n" );
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document.write( "Edwin
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