Unit Circle

The x value on the unit circle is defined by which function?

The y value on the unit circle is defined by which function?

If a trig function is x, then in which quadrants would this trig function be positive? (which quadrant is x positivie?)

• 1 & 2

• 2 & 3

• 3 & 4

• 4 & 1

If y is a trig function, in which quadrants is this function positive? (In which quadrants is y positive?)

• 1 & 2

• 2 & 3

• 3 & 4

• 4 & 1

• 1

• -1
  

• 0

• Undefined