document.write( "Question 1036142: Find sin 2 theta, cos 2 theta, and tan 2 theta for each set of conditions.\r
\n" ); document.write( "\n" ); document.write( "cos theta = -5/13 and pi/2 < theta < pi.\r
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Algebra.Com's Answer #650772 by ikleyn(52794) $\"\"$ $\"About$

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\n" ); document.write( "Find sin 2 theta, cos 2 theta, and tan 2 theta for each set of conditions.\r
\n" ); document.write( "\n" ); document.write( "cos theta = -5/13 and pi/2 < theta < pi.
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document.write( "Since   =   and   <  < , \r\n" );
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document.write( " =  =  =  =  = .\r\n" );
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document.write( "The sign \"+\" was chosen at the square root because the sine is positive in the second quadrant.\r\n" );
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document.write( "Next,\r\n" );
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document.write( " =  =  = ,\r\n" );
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document.write( " =  =  =  = .\r\n" );
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document.write( "By the way, the signs of the    and    say  that   lies in the quadrant 3.\r\n" );
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document.write( "Now,   =  =  = .\r\n" );
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document.write( "Solved.\r\n" );
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