Texas Instruments TI-73 Explorer Manual Book page 219

³
Degree
. # # b
- l :
tan
- u
E b
1
tan(45)
- u
4 5
³
. # # " b
- l :
cos(p/4)
- u
- „ F
Degree
-1
(1)
6
5
E b
Radian
3
E b
4
Chapter 11: Trigonometry
-
p
213
This confirms the
previous result.