Texas Instruments TI-30XIIS Teachers Guide - Page 91
Cosine
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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 < %© 8 DEG 5*cos (75) ' 1. FIX DEG 5*cos (75) ' 1.294095226 DEG © 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 84
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© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
84
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)
5*cos (75)
'
1.294095226
1.294095226
DEG
%
©
"
F
F
0
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
-
DEG
<
5*cos (75)
5*cos (75)
'
1.
1.
FIX
DEG
%
©
8
5*cos (75)
5*cos (75)
'
1.294095226
1.294095226
DEG
Cosine