document.write( "Question 1089321: If a+b=90 degrees, which if the following must be true?
\n" ); document.write( "A)cos(a)=cos(b)
\n" ); document.write( "B)sin(a)=sin(b)
\n" ); document.write( "C)sin(a)=cos(b)
\n" ); document.write( "D)sin(a)= -cos(b) \n" ); document.write( "

Algebra.Com's Answer #703679 by ikleyn(52788) $\"\"$ $\"About$

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\n" ); document.write( "C).\r
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