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Scientific Calculator for Education with Complex number & 417 functionMrp 1,395  1,325(5% off)Inclusive of all taxes
10 + 2 digits
417 Functions
Natural Textbook Display
Solar Battery
Multi-replay (Quick and easy recall of previously executed formulas for editing and re-execution)
Combination and permutation
Integration/differential calculations
Matrix and Vector calculations
Complex number calculations
Base-n calculation
Statistics ((List-based STAT-data editor, Standard deviation, Regression analysis)
Table function
Comes with new slide-on hard case
Dimensions (D *; W *; H): 161.5 *;77 *;11.1 mm
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6 months extended
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Model NameFX-991ESPLUS-2PK
Number Of Digits10 + 2 digits
Display TypeNatural Textbook display - Input and display fractions
and other mathematical formulas and symbols just as they appear in textbooks.
Power SupplyBoth Solar and Battery powered. Solar powered when light is sufficient
battery powered when light is insufficient.
Plastic KeyDesigned and engineered for easy operation.
Number Of Functions417 Functions
Basic Function• 10 + 2 digits
• Matrix and Vector calculations
• Natural Textbook Display
• Multi-replay (Quick and easy recall of previously executed formulas for editing and re-execution)
• Fraction Calculation
• Table Function
• Prime Factorization
• Metric Conversions
• Complex number calculations
• Integration/differential calculations
• 9 variables
• Exponent functions
Logarithmic functions
• Power functions (square root
cubic root
• Coordinate conversion (Pol
• Combination/Permutation (nCr
• Factorial
Random numbers
Random sampling of an existing list
• Logical operations
• Hyperbolic functions
Inverse hyperbolic functions
• Base-n calculations/conversions
• Angle unit
Angle unit conversion (Deg
• Trigonometric functions
Inverse trigonometric functions
•Statistics (List-based STAT data editor
standard deviation
regression analysis)
Hardware• Battery - Solar and Battery
• Plastic keys
• Comes with slide on hard case
Coordinate ConversionDedicated keys to convert polar coordinates to rectangular coordinates and vice versa.
Angle Unit Degree Radian GradianSpecifies degrees
grads as the angle unit for value input and calculation result display.
Minute Degree SecondsAids in sexagesimal calculations with respect to decimal conversion.
Warranty Years3 years
Country Of OriginThailand
ImporterCasio India Co.
Private Limited A-41
First Floor
Mohan Cooperative Industrial Estate
Mathura Road
New Delhi - 110044
Weight G95

Casio Computer Co., Ltd. is a Japanese multinational consumer electronics and commercial electronics manufacturing company headquartered in Shibuya, Tokyo, Japan. Its products include calculators, mobile phones, digital cameras, electronic musical instruments, and analogue and digital watches. It was founded in 1946, and in 1957 introduced the world's first entirely electric compact calculator. It was an early digital camera innovator, and during the 1980s and 1990s, the company developed numerous affordable home electronic keyboards for musicians along with introducing the world's first mass-produced digital watches.
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