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Trigonometric function keys
[sin] - Sine key. It calculates the sine of the displayed angle.
-1
[2nd] (sin
) - Arcsine key. It calculates the smallest angle whose sine
is displayed (first or fourth quadrant, sin
[cos] - Cosine key. It calculates the cosine of the displayed angle.
-1
[2nd] (cos
) - Arccosine key. It calculates the smallest angle whose
cosine is displayed (first or second quadrant, cos
[tan] - Tangent key. It calculates the tangent of the displayed angle.
-1
[2nd] (tan
) - Arctangent key. It calculates the smallest angle whose
tangent is displayed (first or fourth quadrant, tan
It is possible to calculate trigonometric values for angles of more than
one revolution. However, in the case of radians, the rounded value of ��
limits precision for large angles that are multiples of �� and ��/2.
Example: sin 30° = 0.5 = sin 390°
Enter
Press
(use [DRG] to
select degrees)
30
[sin]
390
[sin]
The sine and cosine functions are accurate for all displayed digits
(except as noted above for radians). The tangent of ±90°, ±��/2 radians or
±100 grads causes an error condition to occur, since the function is
undefined at these points.
Display
DEG
0.5
0.5
-1
).
19 -E
-1
).
-1
).
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