© 1999
T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide For Teachers
84
Cosine
?
Use this formula to find how far the
base of the ladder is from the
house. Round your answer to the
nearest whole number, and then
return to floating decimal mode.
D = 5 x COS 75
Press Display
5 V ?
75 E <
5*cos (75)
'
1.294095226
DEG
%
©
"
F 0 1 2 3 4 5 6 7 8 9
-
FIX DEG
<
5*cos (75)
'
1.
FIX DEG
%
©
8
5*cos (75)
'
1.294095226
DEG
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