Texas Instruments voyage 200 User Manual - Page 796

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 csch(3) ¸ 1 sinh(3) Returns the hyperbolic cosecant of expression1 or returns a list of the hyperbolic cosecants of all elements of list1. 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) ¸ cschL1({1,2.1,3}) ¸ {sinhL1(1) .459... sinhL1(1/3)} sinh-1(1) 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. cSolve(x^3=ë 1,x) ¸ solve(x^3=ë 1,x) ¸ 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() temporarily sets the domain to complex during the solution even if the current domain is real. In the complex domain, fractional powers having odd denominators use the principal rather than the real branch. Consequently, solutions from solve() to equations involving such fractional powers are not necessarily a subset of those from cSolve(). cSolve(x^(1/3)=ë 1,x) ¸ solve(x^(1/3)=ë 1,x) ¸ false x = ë1 798 Appendix A: Functions and Instructions