document.write( "Question 1065765: cos θ =-4/5 and 180° < θ < 270°
\n" ); document.write( "Find sin 2θ \n" ); document.write( "

Algebra.Com's Answer #680965 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"sin%5E2%28theta%29%2B%284%2F5%29%5E2=1\"$
\n" ); document.write( " $\"sin%5E2%28theta%29%2B16%2F25=25%2F25\"$
\n" ); document.write( " $\"sin%5E2%28theta%29=9%2F25\"$
\n" ); document.write( " $\"sin%28theta%29=-3%2F5\"$
\n" ); document.write( "So,
\n" ); document.write( " $\"sin%282%2Atheta%29=2sin%28theta%29cos%28theta%29\"$
\n" ); document.write( " $\"sin%282%2Atheta%29=2%28-3%2F5%29%28-4%2F5%29\"$
\n" ); document.write( " $\"sin%282%2Atheta%29=24%2F25\"$ \n" ); document.write( "

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