18
Example
The trigonometry keys,
f
,
g
and
h
, are multi-tap keys.
The angle of depression from a drone flying
100
metres above the water to a buoy at sea is
23 18
. Find the horizontal distance from the drone to the buoy. Give your answer correct to
one decimal place.
Keystrokes and solution
:
The angle mode is
DEG
.
100
tan 23 18
x
=
and so
100
tan 23 18
x
=
Enter
100
and press
k
.
Press
h
and enter
23
.
Press
t
>
>
1
and enter
18
.
Press
t
>
>
2
)
n
.
The horizontal distance is
232.2
metres,
correct to one decimal place.
Note:
Press
w
]
]
>
>
n
to set
the decimal notation mode to a one
decimal place output.
FIX
is displayed as
an indicator at the top of the screen.
Example
Use the TI-
30X Plus MathPrint™ to convert
35 25
to radians. Give your answer
(a)
in terms of
π
.
(b)
correct to four decimal places.
Keystrokes and solution
:
The angle mode is
RAD
.
[Press
w
>
n
to be in radian mode.]
(a)
Enter
35
and press
t
>
>
1
.
Enter
25
and press
t
>
>
2
n
.
85π
35 25
432
=
(b)
Press
c
and so
35 25
0.6181
=
(4 dp).
Summary of Contents for MathPrint TI-30X Plus
Page 27: ...26 So 32 0 9907 P X 4 dp...
