document.write( "Question 826533: The value of sin 3 times pi divided by 4 is negative square root of 2 divided by 2. true or false? \n" ); document.write( "

Algebra.Com's Answer #498127 by jsmallt9(3758) $\"\"$ $\"About$

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$\"pi%2F2+=+%281%2F2%29pi\"$
\n" ); document.write( " $\"3pi%2F4+=+%283%2F4%29pi\"$
\n" ); document.write( " $\"pi+=+1%2Api\"$
\n" ); document.write( "Looking at $\"3pi%2F4\"$ as three fourths $\"pi\"$ helps us figure out that it is greater than $\"pi%2F2\"$ but less than $\"pi\"$ . So $\"3pi%2F4\"$ terminates in the second quadrant.

\n" ); document.write( "sin is positive in the second quadrant so it cannot be $\"-sqrt%282%29%2F2\"$ .
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