Given A unit circle with radius = 1, center point at (0,0) Notes: 5-3 (part 1) Given A unit circle with radius = 1, center point at (0,0) 1 (x, y) sin θ = cos θ = tan θ = Form a right triangle with the x-axis.

csc θ = sec θ = cot θ = sin θ = y cos θ = x tan θ =

Some trig ratios will be negative if the reference angle is in Quadrant II, III, or IV Quadrant II values sinθ = cosθ = tanθ =

Special angles that are located on the axes: examples a. cos 90° = b. tan 270° = c. sin 180° = d. cos 0° =

(from yesterday) radius 45° 60° 45° 30° --------------------------------------------------------------------------------------------------------------------- radius 45° 60° 30° 45°

8. Use the unit circle to find the six trig functions for 225°