document.write( "Question 397427: Find the exact value of sec(-210°) \n" ); document.write( "
Algebra.Com's Answer #281665 by Alan3354(69443)\"\" \"About 
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Find the exact value of sec(-210°)
\n" ); document.write( "sec = 1/cos
\n" ); document.write( "cos(-210) = cos(210) = -sqrt(3)/2
\n" ); document.write( "sec = -2sqrt(3)/3
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