document.write( "Question 204698: verify that each of the following is an identity:
\n" ); document.write( "1) cos x/ 1-sin^2x= sec x
\n" ); document.write( "2) sec x/sin x - sin x/cos x = cot x
\n" ); document.write( "3) 1+tan^2ø/ cos ^2ø = sec^4 ø\r
\n" ); document.write( "\n" ); document.write( "I really need ur help :) thank u so much \n" ); document.write( "
Algebra.Com's Answer #154491 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
verify that each of the following is an identity:
\n" ); document.write( "1) cos x/ 1-sin^2x= sec x
\n" ); document.write( "cosx/(cos^2x) = secx
\n" ); document.write( "1/cosx = secx
\n" ); document.write( "secx = secx
\n" ); document.write( "--------------------------------
\n" ); document.write( "2) sec x/sin x - sin x/cos x = cot x
\n" ); document.write( "Multiply thru by (sinx)(cosx) to get:
\n" ); document.write( "(secx)(cosx) - (sinx)(sinx) = (cosx/sinx)(sinx)(cosx)
\n" ); document.write( "---
\n" ); document.write( "1 - sin^2 = cos^2x
\n" ); document.write( "cos^2x = cos^2x
\n" ); document.write( "--------------------------------
\n" ); document.write( "3) 1+tan^2ø/ cos ^2ø = sec^4 ø
\n" ); document.write( "sec^2x/cos^2x = sec^4x
\n" ); document.write( "1/cos^4x = sec^4x
\n" ); document.write( "sec^4x = sec^4x
\n" ); document.write( "========================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "
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