2-4-2

Function Calculations

kTrigonometric 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 “13-2 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–10.5 =30°

 

TRIG

 

Func

 

S 0.5 w

(Determine x for sinx = 0.5.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“.5” can also be used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

π

 

 

 

TRIG

 

Func

 

Change the [Angle] setting to

cos((––) rad) = 0.5

 

 

3

 

 

 

 

 

 

 

“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.

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