Casio FX 991 ES Plus 2E School Science Calculator

The calculator from the experts at Casio is an excellent choice for advanced mathematical and statistical operations. Weighing just 95 grams and measuring 11 × 77 × 162 mm, this piece offers 417 different mathematical functions to solve any problem in no time. It is also an excellent choice for demanding users, such as high school seniors or college students. It displays everything on a 31×96 pixel dot-matrix display in a natural textbook look. It also offers algebraic entry of expressions and displays mantis and exponent 10+2. It also comes straight in a hard slip-on case, and its power supply is dual: 1× LR44 battery + solar powered. Mathematical functions Display Dot 3196 dots Natural textbook display Natural algebraic input of expressions Number of characters/lines 15/1+10/1 Mantis and exponent display 10+2 Memory Repeat function 9 variable memories Mathematical functions 417 functions 40 scientific constants 40 metric conversions 24 levels of brackets Calculations with fractions Angle units degrees, radians, grads Conversions between angle units (degrees, radians, grad) Conversions between polar and Cartesian coordinate systems Goniometric functions sin/cos/tan/sin-1/cos-1/tan-1 Hyperbolic functions sinh/cosh/tanh/sinh-1/cosh-1/tanh-1 Exponential functions, natural, decimal and general logarithm Mathematical functions ?, x2, x-1, 1/x, x!, xy, x1/y Calculations in number systems with base n (decimal, hexadecimal, binary, octal) Logic functions (AND/OR/...) Conversions between hexadecimal and decimal systems Percentage calculations ENG functions (technical exponential number form) Calculations with complex numbers Random number generator Calculations with matrices and vectors Solving non-linear equations Table of function values Statistics Sums of ?x, ?x2 Sums of ?x, ?y, ?x2, ?y2, ?xy Standard deviation Regression Functions for calculating variations (nPr) and combinations (without repeats) (nCr). Differential integral calculations Numerical integration Numerical derivation Other Fixed slip-on case Automatic shutdown Power supply : Dual (Solar + Battery 1x LR44) Dimensions (hxwxd mm) 11 x 77 x 162 Weight 95g