document.write( "Question 716680: Use the reference angle to find the exact value for each of the following:\r
\n" ); document.write( "\n" ); document.write( "a. tan(-675degree)\r
\n" ); document.write( "\n" ); document.write( "b. cos 7pi/2
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Algebra.Com's Answer #440028 by lwsshak3(11628)\"\" \"About 
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Use the reference angle to find the exact value for each of the following:
\n" ); document.write( "a. tan(-675degree)
\n" ); document.write( "-675º is like rotating one revolution (360º) clockwise plus another 315º terminating in quadrant I at 45º where tan>0
\n" ); document.write( "tan(-675degree)=tan(45º)=1
\n" ); document.write( "..
\n" ); document.write( "b. cos 7pi/2
\n" ); document.write( "7π/2 is like rotating 3 revolutions counter-clockwise plus π terminating at π.
\n" ); document.write( "cos 7π/2=cos π=-1
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