1. sin  = sin  = sin  = cos  = cos  = cos  = tan  = tan  =
Geometry/Trig Name __________________________
8-5 SOHCAHTOA Notes Date ______________ Block ________
What is Trig used for? ____________________________________________________
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Greek symbol for an angle
3 Basic Trig Functions ABBREVIATIONS
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To solve for a missing side or angle in a right triangle, use…
Example: Express each value as a fraction.
sin  =
cos  =
tan  =
Example 2: Express each value as a fraction. Example 3: Express each value as a fraction.
sin  = sin  =
cos  = cos  =
tan  = tan  =
sin  =
cos  =
tan  =

2. Geometry/Trig
8-5 SOHCAHTOA Notes
Directions: Use Trigonometry to solve for the missing side or angle measurement.
Example 1: Example 2:
Example 3: Example 4:
Example 5: Example 6:

3. Geometry/Trig Name __________________________
8-5 SOHCAHTOA Notes DAY 2 Date ______________ Block ________
Example 1: Express each value as a fraction. Example 2: Express each value as a fraction.
sin β =
cos β =
tan β =
sin θ =
cos θ =
tan θ =
Example 3: Given Find sin β and Example 4: Given Find cos θ and
tan β. Leave answers as fractions, in tan θ. Leave answers as fractions, in
simplest form simplest form.

4. Inverse Trig Functions:
Geometry/Trig
8-5 SOHCAHTOA Notes DAY 2
Inverse Trig Functions:
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Example 1: Example 2:
Example 3: Example 4:
Practice: Solve for the missing angle(s) using trig. Round to the nearest hundredth.
1) 2) 12 θ 15 θ β 20 10