Texas Instruments TI89TITANIUM User Manual - Page 887

tan(squareMatrix1) ⇒ squareMatrix Returns the matrix tangent of squareMatrix1. This is not the same as calculating the tangent of each element. For information about the calculation method, refer to cos(). squareMatrix1 must be diagonalizable. The result always contains floating-point numbers. In Radian angle mode: tan([1,5,3;4,2,1;6,ë2,1]) ¸ ë122.81.1279...1... 26.088... ë 7.835... 11.114... ë 5.481...   36.818... ë 32.806... ë 10.459...  tanê () ¥ S key tanê (expression1) ⇒ expression tanê (list1) ⇒ list tanê (expression1) returns the angle whose tangent is expression1 as an expression. tanê (list1) returns a list of the inverse tangents 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: tanê (1) ¸ 45 In Gradian angle mode: tanê (1) ¸ 50 In Radian angle mode: tanê ({0,.2,.5}) ¸ {0 .197... .463...} tanê(squareMatrix1) ⇒ squareMatrix Returns the matrix inverse tangent of squareMatrix1. This is not the same as calculating the inverse tangent of each element. For information about the calculation method, refer to cos(). squareMatrix1 must be diagonalizable. The result always contains floating-point numbers. In Radian angle mode: tanê([1,5,3;4,2,1;6,ë2,1]) ¸ .ë7.4088...3... 1.266... .630... .622... ë.070...   1.686... ë 1.182... .455...  tanh( ) MATH/Hyperbolic menu tanh(expression1) ⇒ expression tanh(list1) ⇒ list tanh(expression1) returns the hyperbolic tangent of the argument as an expression. tanh(1.2) ¸ tanh({0,1}) ¸ .833... {0 tanh(1)} tanh(list) returns a list of the hyperbolic tangents of each element of list1. tanh(squareMatrix1) ⇒ squareMatrix Returns the matrix hyperbolic tangent of squareMatrix1. This is not the same as calculating the hyperbolic tangent of each element. For information about the calculation method, refer to cos(). In Radian angle mode: tanh([1,5,3;4,2,1;6,ë2,1]) ¸ .ë4.8089...7... .933... .538... .425... ë.129...   1.282... ë 1.034... .428...  squareMatrix1 must be diagonalizable. The result always contains floating-point numbers. Appendix A: Functions and Instructions 887