document.write( "Question 206719: cosx+tanx(sinx)=secx \n" ); document.write( "

Algebra.Com's Answer #156245 by vleith(2983) $\"\"$ $\"About$

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cosx+tanx(sinx)=secx
\n" ); document.write( "cosx+(sinx/cosx)(sinx)=secx
\n" ); document.write( "cosx + sin^2x/cosx -= 1/cosx
\n" ); document.write( "(cos^2x + sin^2x)/ cosx = 1/cosx
\n" ); document.write( "(cos^2x + sin^2x) = 1
\n" ); document.write( "Which is a trig identity \n" ); document.write( "

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