1. Chapter 13 Right Angle Trigonometry
Algebra 2
Chapter 13
Right Angle Trigonometry

2. TOA SOH CAH Trigonometry A B C A Hypotenuse Leg Opposite A
Leg Adjacent
To A
TOA
SOH
CAH

3. Example… Find sin L, cos L, tan L Find sin N, cos N, tan N. 17 815 8 N
Hypotenuse
opposite L
adjacent
Find sin L, cos L, tan L
Find sin N, cos N, tan N.

4. Using the Calculator…. Example: = 0.9991 tan 27.5° = 0.5206
To find the value of a function…push the
appropriate button (sin, cos, tan), then
the angle measure, and enter (=).
Example: =
tan 27.5° =
0.5206

5. More … Calculator… To find the measure of the angle:
2nd, function (sin, cos, tan), the
value, the enter (=).
Example:
cos R =
B = 51.5°
R = 50.2°

6. Back to triangles…. Example Find x. cos 41 = x/32 x = 32cos4123 11 x
cos 41 = x/32
x = 32cos41
x = 64.4°
x =