document.write( "Question 766536: cos(x+y) =4/5 sin (x-y) = 5/13
\n" ); document.write( " x and y lies between 45° .
\n" ); document.write( " find the value of tan2x \n" ); document.write( "

Algebra.Com's Answer #466983 by lwsshak3(11628) $\"\"$ $\"About$

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cos(x+y) =4/5 sin (x-y) = 5/13
\n" ); document.write( "x and y lies between 45° .
\n" ); document.write( "find the value of tan2x
\n" ); document.write( "***
\n" ); document.write( "cos(x+y)=4/5
\n" ); document.write( "x+y≈36.87º
\n" ); document.write( "sin(x-y)=5/13
\n" ); document.write( "x-y≈22.62º
\n" ); document.write( "..
\n" ); document.write( "x+y≈36.87º
\n" ); document.write( "x-y≈22.62º
\n" ); document.write( "add
\n" ); document.write( "2x≈59.49º
\n" ); document.write( "tan2x≈1.70 \n" ); document.write( "

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