Open Middle®
Directions: Using the digits 1 to 9 at most one time each, place a digit in each box so that the function has the greatest possible value.
Hint
How can you tell whether your function is correct? What is the greatest possible value the sine function can have?
Answer
The greatest possible value is sin(3π/6) = √4/2.
Source: Robert Kaplinsky in Open Middle Math
