Calculator for 991ES-PLUS Original Scientific Calculator 417 Functions For High School University Students Office Coin Battery

​Features: Stable product quality and sensitive response. Soft touch keyboard, not easily stuck keys. The large display screen and symmetrical ergonomic design allow numbers to be mastered with one hand. 417 Functions: Display Mathematical functions in textbook format. Specification: Material: ABS Size: 80*11*162mm Adapted Battery: Button Battery Functions: 1. routine Calculation 1) arithmetic calculation 2) Score calculation/percentage calculation/rational number calculation, etc. 3) Degree, minute, second calculation 4) Variable calculation (use CALC) 5) Equation solution (use SOLVE) 6) Calculation of various functions (trigonometric/anti-trigonometric function, hyperbolic/inverse hyperbolicfunction, exponent/logarithmic function, power function/power square root function, integral/differentialcalculation, calculus summatorius). 7) Other calculations (factorial, absolute value, random number, permutations and combinations, roundingfunction). ​2. Plural Computing 1) The addition, subtraction, multiplication, and division of plural 2) Calculation of auxiliary Angle and model 3) The inverse, square, and cubic of plural 4) The calculation of complex conjugate numbers ​3. Statistical Calculation 1) single variable 2) linear regression 3) quadratic regression 4) logarithmic regression 5) e exponential regression 6) ab exponential regression ​4. Number Systems Converter (radix calculation) 1) DEC decimalism 2) HEX hexadecimal 3) BIN binary system 4) OCT octonary number system ​5. Equation Calculation 1) One equation with two unknowns 2) One equation with three unknowns 3) Quadratic 4) Cubic Equation ​6. Matrix Calculation 1) Calculate matrix replication, addition, scalar multiplication, multiplication, square, and cube 2) Calculate the determinant, transposition and inverse matrix of the matrix 3) Compute the modulus of each element of the matrix ​​7. Vector Computation 1) Calculate vector replication, vector addition, scalar multiplication, vector dot product 2) Compute the norm of vector Package Included: 1x Calculator for 991ES-PLUS Packing Safely in Retail Box. ​Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.