Texas Instruments TI-84 Plus - Page 615

Appendix A: Functions and Instructions 612
sub(string,begin,length) Returns a string that is a
subset of another string,
from begin to length.
y N
sub(
sum(list[,start,end]) Returns the sum of
elements of list from start to
end.
y 9
MATH
5:sum(
tan(value) Returns the tangent of a
real number, expression, or
list.
š
tan
L1
(value)
Returns the arctangent of a
real number, expression, or
list.
y A
Tangent(expression,
value)
Draws a line tangent to
expression at X=value.
y <
DRAW
5:Tangent(
tanh(value) Returns hyperbolic tangent
of a real number,
expression, or list.
y N
tanh(
tanh
L1
(value)
Returns the hyperbolic
arctangent of a real
number, expression, or list.
y N
tanh
L1
(
tcdf(lowerbound,
upperbound,df)
Computes the Student-t
distribution probability
between lowerbound and
upperbound for the specified
degrees of freedom df.
y =
DISTR
6:tcdf(
F unction or
Instruction/Arguments Result
Key or
Keys/Menu or
Screen/Item