document.write( "Question 11178: It's been a while since I've taken any algebra class, so most of my problems revolve around a single missing part of the process. My only access to the internet right now is via my cell phone. I apologize for not using your preferred bracket method to point out the problem. I will display the problem the best I can.
\n" ); document.write( "(I'm not sure about the n; (could be pie?), the type on the sheet is a bit messed up. I'll use \"ť\" to represent an exponent.)\r
\n" ); document.write( "\n" ); document.write( "Here's the problem:\r
\n" ); document.write( "\n" ); document.write( "((( Find f(nťr/4) if f(x) =
\n" ); document.write( "(-2 sin (2x))/3 + (5 cos (4x))/6 )))\r
\n" ); document.write( "\n" ); document.write( "The answer I have is (-3/2). I just have no idea how to get it. \n" ); document.write( "

Algebra.Com's Answer #5836 by longjonsilver(2297) $\"\"$ $\"About$

You can put this solution on YOUR website!
i think what you have here is find $\"f%28pi%2F4%29\"$ which is the radian measure corresponding to 45 degrees.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "So, from (-2 sin(2x))/3 + (5 cos(4x))/6 we have
\n" ); document.write( "(-2sin(2*45))/3 + (5cos(4*45))/6
\n" ); document.write( "(-2sin(90))/3 + (5cos(180))/6
\n" ); document.write( "(-2(1))/3 + (5(-1))/6
\n" ); document.write( "-2/3 + (-5/6)
\n" ); document.write( "-2/3 - 5/6
\n" ); document.write( "-4/6 - 5/6
\n" ); document.write( "-9/6
\n" ); document.write( "-3/2\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "jon.
\n" ); document.write( " \n" ); document.write( "

\n" );