# Answer to Question #19796 in Trigonometry for kevin

simplify the expression
sin x cos x
--------------
tan x

1
2012-12-20T08:59:23-0500

tan(x) = sin(x) / cos (x)

hence

sin(x)cos(x) / tan(x)= sin(x)*cos(x)*cos(x) / sin(x) = cos(x)*cos(x) = (cos(x))^2

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