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HP -28S Manual Page 84

Advanced scientific calculator.
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Add -4
+
3i.
(Remember to press
[IJ
~
to enter -4.)
CO
-4
[J
3
[!]
3:
2:
Multiply by 6
+
l.
C06[J10
1:
(5,5)
m:JIm. . .
m:JlI _ _
3:
2:
1:
(25,35)
m:JIm. . .
m:JlI _ _
Sometimes a real-number argument can produce a complex-number
result.
Calculate
VC"4.
-4.ffiJ
Calculate arcsin 2.
2
1
TRIG
I
ASIN
3:
2:
(25~35)
1:
(~,2)
m:JIm. . .
m:JlI _ _
I~ (1.57079632679~ (~,2)
-1.31695789692)
~r:m:JI:mIII:ImIIECIIIlillCI
Functions specifically for complex numbers are in the COMPLEX
menu.
Select the COMPLEX menu .
1
COMPLX
I
I~ (1.57079632679~
(0,2)
-1.31695789692)
DDlaa"~m:D1iE3
All commands in the COMPLEX menu are described briefly in appen-
dix D, "Menu Map." For complete descriptions, refer to "COMPLEX"
in the Reference Manual.
• R-C (real-to-complex) converts two real numbers x and y to one
complex number
(x,
y).
• C - R (complex-to-real) converts one complex number (x, y) to two
real numbers
x
and
y.
• RE (real part) returns x for a complex argument (x,
y).
6: Complex-Number Functions
83

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