Tandy 600 Owner's Manual page 208

SQRT(N)
Returns the square root of the argument. N must be positive. If N is
negative, it returns a
#
NUM !
#
error value .
STDEV (list)
Calculates the sample standard deviation (sd) of n number of values, x (the
values in the list), according to the formula:
J
r---(
~
X)'
\
~,
x _
i= I
\ . .:..... n
(i
= sd = \
'_0'_._.
o _
n-I
Result:
8
10
STDEV(scores)
scores = 95,80,73,74,89,95,98,97
10.4
Examples:
SQRT (64)
SQRT (8*8 + 6*6)
Example:
Assume:
Result:
);
)
)
,
. .
1
1
)
SUM (list)
Returns the sum of the values in the list.
TAN (N)
Calculates the tangent of N, an angle in radians. Use TAN «N)*.01745329)
if N is expressed in degrees.
Example:
Assume:
Result:
(I + rate)*SUM (charges)
rate = 1.5% (a monthly interest rate)
charges = $150
152 (the total charges plus interest for the month)
}
Example:
Assume:
Result:
TAN «R4C3)*.0 1745329)
R4C3 = 30 (a 30 degree angle)
0.5773502
TRUE ( )
Returns the logical value true.
Example:
IF (R IC I, "YES", "NO")
201
Assume:
RICI=TRUE( )
Result:
YES
NO