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© 1999 T

EXAS

I

NSTRUMENTS

I

NCORPORATED

TI-30X ÙS: 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)

'

1.2940952261.294095226

DEG

%

©

"

F F 00 1 2 3 4 5 6 7 8 91 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)

'

1.2940952261.294095226

DEG

Cosine