Lesson 20 - Trigs (Finding Exact values)

Pg. 271: 5,17,22,28

Lesson 20 - 6.6 # 5: Find exact value for .

135 deg is in Q-II with Ref. Angle of 45 deg, tangent is negative in Q-II, so

 Lesson 20 - 6.6 # 20: Write a possible formula for graph of tangent function:

Since graph looks like a tan(x) shifted to the right by 45 degrees then formula is
Lesson 20 - 6.6 # 22: Find exact value given:

(a) in Q-III

So

(b) in Q-III (y and x negative)

So

Lesson 20 - 6.6 # 28: Find exact value for

So

So