document.write( "Question 933008: i ned help using the unit circle. the question is find the exact value of sec (-780 degrees) \n" ); document.write( "
Algebra.Com's Answer #566514 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
May add multiples of 360 until You get in the positive range
\n" ); document.write( "sec(-780) = 1/cos(-780) = 1/cos(-780 + 3(360) = 1/cos(300) =1/(1/2) = 2
\n" ); document.write( "sec(-780) = 2
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