Using solve – Casio fx-991ES PLUS User Manual
Page 21
E-20
7
20
To exit CALC:
To store A + B
i
and then determine
'
3 +
i
, 1 +
'
3
i
using polar
coordinates (
r
θ
)
B
(CMPLX)
(A) 4(B)$(
i
)
(CMPLX)(
r
θ
)
<
< (or ) 1
To exit CALC:
Note: During the time from when you press
< until you exit CALC by
pressing
, you should use Linear Display input procedures for input.
Using SOLVE
SOLVE uses Newton’s Law to approximate the solution of equations. Note
that SOLVE can be used in the COMP Mode (
) only.
The following describes the types of equations whose solutions can be
obtained using SOLVE.
• Equations that include variable X: X
2
+ 2X – 2, Y = X + 5, X = sin(M), X
+ 3 = B + C
SOLVE solves for X. An expression like X
2
+ 2X – 2 is treated as X
2
+ 2X
– 2 = 0.
• Equations input using the following syntax: {equation}, {solution
variable}
SOLVE solves for Y, for example, when an equation is input as: Y = X + 5,
Y
Important: • If an equation contains input functions that include an open
parenthesis (such as sin and log), do not omit the closing parenthesis.
• The following functions are not allowed inside of an equation:
°,
d
/
dx
,
3,
Pol, Rec.
To solve
y
=
ax
2
+
b
for
x
when
y
= 0,
a
= 1, and
b
= –2
5(Y) <(=) (A)
(X)7 4(B)
<(SOLVE)
Prompts for input of a value for Y Current value of Y
Math
CMPLX
Math
CMPLX
Math
Math