How can i get sin(1) in SymbolicUtils?

[liushang0322]

in matlab sin(sym(1))

the answer is: sin(1)

i want to know how can i get the result which is like substitute(sin(x),Dict([x=>1]),fold=false)

This is not as concise as matlab

[shashi]

julia> term(sin,1)
sin(1)