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20050501
k Trigonometric Functions (sin, cos, tan) and Inverse Trigonometric
Functions (sin
–1
, cos
–1
, tan
–1
)
The first four examples below use “Degree” (indicated by “Deg” in the status bar) as the
angle unit setting. The final example uses “Radian” (indicated by “Rad”). For details about
the [Setup] menu, see “14-2 Using the Setup Menu”.
Problem
Use this keyboard:
Operation
mth abc cat 2D
sin63° = 0.8910065242 TRIG Func s 63 w
2
·
sin45° × cos65° TRIG Func 2*s 45 )*c 65 w
= 0.5976724775
Can be omitted.
cosec30° =
1
= 2
TRIG Func 1/s30w or
sin30° )
N 1 c
9 s 30 w
sin
–1
0.5 =30° TRIG Func S 0.5 w
(Determine x for sinx = 0.5.)
“.5” can also be used.
TRIG Func Change the [Angle] setting to
“Radian”.
c7 /3 w or
c)N 7c 3 w
Tip
• The angle unit setting you specify remains in effect until you change it.
•To move between entry boxes in a 2D math symbol you can use the cursor keys or tap inside a
box.
2-4-2
Function Calculations
π
cos((––) rad) = 0.5
3
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