関連ワード:  fx mod x is a continuous function    fx mod cos x is a continuous function    prove that fx mod x is a continuous function    show that fx mod cos x is a continuous function    prove that fx mod x 4 is a continuous function    is the function defined by fx mod x is a continuous function    show that function defined by fx mod cos x is a continuous function    is mod x a continuous function    is mod function continuous    is mod x continuous