1. 7.3 Special Angles (45 & Quadrantal)

2. Isosceles Right Triangle
45 angles w/ hypotenuse = 1
2 sides are equal
45 1
45

3. Memorize!! Trig Values for 45 SOH – CAH – TOA Hyp Opp 45 Adj
reciprocals

4. Trig Values for 180
x = -1
y = 0
r = 1
180
(-1, 0)
reciprocals

5. Quadrantal Angles 0, 90, 180, 270 90 0 180 270 (0, 1) (1, 0)
(-1, 0)
(1, 0)
(0, -1)
270

6. Ex 1) Find the related angle of 237y
237
180 x
237 – 180 =
57
(+) acute
270

7. Find the exact values of the trig functions of 135y
Reference  for 135 is 45
135 is in QII, x is (–), y is (+)
45 x

8. Homework
#707 Pg – 50 all, 60, 64, 65 & Memorize 45 & Quadrantal Angle Trig Values