Texas Instruments TITANIUM TI-89 - Manual (Page 798)

798 Appendix A: Functions and Instructions
csc() MATH/Trig menu
csc( expression1 )
⇒ ⇒ ⇒ ⇒ expression
csc( list1 ) ⇒ ⇒ ⇒ ⇒ list
Returns the cosecant of expression1 or returns a
list containing the cosecants of all elements in
list1 .
In Degree angle mode:
csc(45) ¸ ‡ 2
In Gradian angle mode:
csc(50) ¸ ‡ ‡ ‡ ‡ 2222
In Radian angle mode:
csc({1,p/2,p/3}) ¸
{
1
sin(1)
1 2 ¦
3
3 }
csc LLLL1 () MATH/Trig menu
csc -1 ( expression1 )
⇒ ⇒ ⇒ ⇒ expression
csc -1 ( list1 ) ⇒ ⇒ ⇒ ⇒ list
Returns the angle whose cosecant is expression1
or returns a list containing the inverse cosecants
of each element of
list1 .
Note: The result is returned as a degree, gradian
or radian angle, according to the current angle
mode setting.
In Degree angle mode:
csc L 1 (1) ¸ 90
In Gradian angle mode:
csc L 1 (1) ¸ 100
In Radian angle mode:
csc L 1 ({1,4,6}) ¸
{
p
2 sin L 1 (1/4) sin L 1 (1/6) }
csch() MATH/Hyperbolic menu
csch( expression1 )
⇒ ⇒ ⇒ ⇒ expression
csch( list1 ) ⇒ ⇒ ⇒ ⇒ list
Returns the hyperbolic cosecant of expression1 or
returns a list of the hyperbolic cosecants of all
elements of
list1 .
csch(3) ¸
1
sinh(3)
csch({1,2.1,4}) ¸
{
1
sinh(1)
.248…
1
sinh(4)}
csch LLLL1 ()
MATH/Hyperbolic menu
csch LLLL1 ( expression1 ) ⇒ ⇒ ⇒ ⇒ expression
csch LLLL1 ( list1 ) ⇒ ⇒ ⇒ ⇒ list
Returns the inverse hyperbolic cosecant of
expression1 or returns a list containing the
inverse hyperbolic cosecants of each element of
list1 .
csch L 1 (1) ¸ sinh -1 (1)
csch L 1 ({1,2.1,3}) ¸
{sinh L 1 (1) .459… sinh L 1 (1/3)}
cSolve()
MATH/Algebra/Complex menu
cSolve( equation , var ) ⇒ ⇒ ⇒ ⇒ Boolean expression
Returns candidate complex solutions of an
equation for
var . The goal is to produce
candidates for all real and non-real solutions.
Even if
equation is real, cSolve() allows non-real
results in real mode.
Although the TI-89 Titanium/Voyage™ 200
processes all undefined variables that do not end
with an underscore (_) as if they were real,
cSolve() can solve polynomial equations for
complex solutions.
cSolve(x^3=ë 1,x) ¸
solve(x^3=ë 1,x) ¸