document.write( "Question 1076620: Verify the identity.\r
\n" ); document.write( "\n" ); document.write( "(1/cosx+1) + (1/cosx-1) = -2cscx cot x \n" ); document.write( "
Algebra.Com's Answer #691272 by MathTherapy(10557)\"\" \"About 
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\n" ); document.write( "Verify the identity.\r
\n" ); document.write( "\n" ); document.write( "(1/cosx+1) + (1/cosx-1) = -2cscx cot x
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\"1%2F%28cos+%28x%29+%2B+1%29+%2B+1%2F%28cos+%28x%29+-+1%29+=+-+2+csc+%28x%29+cot+%28x%29\"
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document.write( "Left side: \"%28cos+%28x%29+-+1+%2B+cos+%28x%29+%2B+1%29%2F%28cos+%28x%29+%2B+1%29%28cos+%28x%29+-+1%29\" ------ Multiplying by LCD, (x + 1)(x - 1)
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document.write( "            \"%282+cos+%28x%29%29%2F%28cos%5E2+%28x%29+-+1%29\"
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document.write( "            \"%282+cos+%28x%29%29%2F%281+-+sin%5E2+%28x%29+-+1%29\" ------- Substituting \"matrix%281%2C3%2C+1+-+sin%5E2+%28x%29%2C+for%2C+cos%5E2+%28x%29%29\"
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document.write( "            \"%282+cos+%28x%29%29%2F%28-+sin%5E2+%28x%29%29\" =======> \"%28-+2+%2A+cos+%28x%29%29%2Fsin%5E2+%28x%29\" =======> \"-+2+%2A+%28cos+%28x%29%2Fsin+%28x%29%29+%2A+%281%2Fsin+%28x%29%29\" =======> \"highlight_green%28-+2+%2A+cot+%28x%29+%2A+csc+%28x%29%29\" (Same as RIGHT side so this has been proven) \n" );
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