Texas Instruments TI-89 User Manual - Page 798
cSolve, Although the TI-89 Titanium/Voyage™ 200
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csc() MATH/Trig menu csc(expression1) ⇒ expression csc(list1) ⇒ list In Degree angle mode: Returns the cosecant of expression1 or returns a csc(45) ¸ ‡2 list containing the cosecants of all elements in list1. In Gradian angle mode: csc(50) ¸ ‡2 In Radian angle mode: csc({1,p/2,p/3}) ¸ { 1 sin(1) 1 2 ¦ 3 3} cscL1() 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: cscL1(1) ¸ 90 In Gradian angle mode: cscL1(1) ¸ 100 In Radian angle mode: cscL1({1,4,6}) ¸ { p 2 sinL1(1/4) sinL1(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... sin1h(4)} cschL1() MATH/Hyperbolic menu cschL1(expression1) ⇒ expression cschL1(list1) ⇒ list Returns the inverse hyperbolic cosecant of expression1 or returns a list containing the inverse hyperbolic cosecants of each element of list1. csch L1(1) ¸ sinh-1(1) cschL1({1,2.1,3}) ¸ {sinhL1(1) .459... sinhL1(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) ¸ 798 Appendix A: Functions and Instructions