document.write( "Question 63185: if sec=5/9, find cos. \n" ); document.write( "

Algebra.Com's Answer #43963 by Earlsdon(6294) $\"\"$ $\"About$

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Since the cos and sec are inverses of each other (sec = 1/cos), then if sec = 5/9, cos = 9/5 \n" ); document.write( "

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