document.write( "Question 39037: Sec a- Cos a/ Tan a = Sin a \n" ); document.write( "

Algebra.Com's Answer #24524 by fractalier(6550) $\"\"$ $\"About$

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From
\n" ); document.write( "(sec a - cos a) / tan a = sin a
\n" ); document.write( "Convert the left side to all sines and cosines...
\n" ); document.write( "((1/cos a) - cos a) / (sin a / cos a) =
\n" ); document.write( "Now multiply it by cos a / cos a and get
\n" ); document.write( "(1 - cos^2 a) / sin a =
\n" ); document.write( "sin^2 a / sin a =
\n" ); document.write( "sin a = sin a
\n" ); document.write( "and we're done. \n" ); document.write( "

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