1. Warm-up:
(put at top of today’s assignment p.336)
A. Draw this unit circle and label the coordinates of the given points.

2. Warm-up: sinθ = cscθ = cosθ = secθ = tanθ = cotθ =
B. Give a “definition” for each of the following in terms of x, y, and r:
sinθ = cscθ =
cosθ = secθ =
tanθ = cotθ =

3. Warm-up:
C. Use your unit circle and definitions to evaluate the following expressions:
sin 180° = tan 90° =
cot 270° = sec 360° =

4. SOLUTIONS TO WARM-UP
A. Draw this unit circle and label the coordinates of the given points.

5. SOLUTIONS TO WARM-UP
B. Give a “definition” for each of the following in terms of x, y, and r:
sinθ = cscθ =
cosθ = secθ =
tanθ = cotθ =

6. SOLUTIONS TO WARM-UP
C. Use your unit circle and definitions to evaluate the following expressions:
sin 180° = tan 90° =
cot 270° = sec 360° =

8. Ch.5 Group Quiz Tuesday Ways to study: Read through your ch.5 notes
(targeting items on your study list)
Complete the chapter review on
p and rework some of the
problems from past assignments

9. Formulas to know for the quiz!!!y x r
(x, y)
Also know reciprocal trig functions! 9

10. 45°
60°
45°
30°
radius
45°
60°
30°
45° 10

11. works for any type of triangle.
Law of Sines:
works for any type of triangle. 11

12. ↓This side is across from this angle ↓
Law of Cosines:
↓This side is across from this angle ↓
a2 = b2 + c2 – 2bc(cosA)
b2 = a2 + c2 – 2ac(cosB)
c2 = a2 + b2 – 2ab(cosC)

13. Finding the area of a triangle when the base and height are not given:13

14. Formulas to know for the quiz!!!