document.write( "Question 800566: Find the exact value of the trigonometric function at the given real number. \r
\n" ); document.write( "\n" ); document.write( "(a) sin 5pi/4
\n" ); document.write( "(b) sec 5pi/4
\n" ); document.write( "(c) tan 5pi/4
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Algebra.Com's Answer #483173 by lwsshak3(11628)\"\" \"About 
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Find the exact value of the trigonometric function at the given real number.
\n" ); document.write( "Given reference angle 5π/4 is in quadrant III where sin<0, cos<0, tan>0
\n" ); document.write( "(a) sin 5pi/4=-√2/2
\n" ); document.write( "(b) sec 5pi/4=-√2
\n" ); document.write( "(c) tan 5pi/4=1
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