[br][br][b]Start with this expression:[br][br][/b]expr := sin(x)^2 * cos(x)^2[br][br]Explore the following:[list][*]Can you simplify this using known identities?[/*][*]Can you express it in terms of sin(2x)?[/*][/list]

[i][br][br]You need to find the right command alone this time.[/i]

Try your own approach using:[br][br]expr := (1 - cos(2x))*(1 + cos(2x))/4