document.write( "Question 1035229: what is the reference angle for −7π/4 ? \n" ); document.write( "

Algebra.Com's Answer #649869 by josmiceli(19441) $\"\"$ $\"About$

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Rotate the unit vector in the CW direction
\n" ); document.write( "from the zero reference ( due to the minus sign )
\n" ); document.write( " $\"+pi%2F4+\"$ is visualized as 45 degrees, so
\n" ); document.write( " $\"+45%2A7+=+315+\"$ degrees
\n" ); document.write( "That is 45 degrees short of returning to the
\n" ); document.write( "zero reference ( turning CW ).
\n" ); document.write( "So, the reference angle would be $\"+pi%2F4+\"$
\n" ); document.write( "in the 1st quadrant \n" ); document.write( "

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