sin tracer

Move the green point to form a central angle of 1 radian. What is the sign of sin(1)?

Move the green point to form a central angle of 2 radians. What is the sign of sin(2)?

Move the green point to form a central angle radians. What is the sign of sin()?

Move the green point to form a central angle 5 radians. Which of the following is true?