document.write( "Question 32479: prove the following identity:\r
\n" ); document.write( "\n" ); document.write( "sin theta cos theta - sec theta sin theta = -sin^2 theta tan theta \n" ); document.write( "
Algebra.Com's Answer #19136 by Fermat(136)\"\" \"About 
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sinθ.cosθ - secθ.sinθ = -sinēθ.tanθ
\n" ); document.write( "starting with the lhs, take out secθ,
\n" ); document.write( "(sinθ.cosēθ - sinθ)secθ
\n" ); document.write( "take out sinθ,
\n" ); document.write( "(cosēθ - 1).(sinθ/cosθ)
\n" ); document.write( "-(1-cosēθ)tanθ
\n" ); document.write( "-sinēθ.tanθ
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