|30 days from delivery||Damaged, Defective, Item not as described||Replacement|
|30 days from delivery||Exchange for colors and size, Does not fit||Exchange|
|10 days from delivery||Damaged, Item not as described||Replacement|
Casio Calculators provide quick and easy results and are widely used by businessmen and students around the world. The Casio FX991ES is a scientific calculator with a Full Dot Matrix Natural Textbook Display. The screen is wide and spacious and this calculator has plastic keys, which are designed and engineered for easy operation.
Body and Power
The Casio FX991ES has multiple abilities and is capable of performing 403 functions in all. This calculator has a 10-digit mantissa + 2-digit exponential display with an AAA size R03 battery.
Complex mathematical calculations such as integration, differential equations, matrix and vector calculations, complex number calculation, CALC function, SOLVE function, base-n calculation. Sin, cos and tan functions help solve geometrical problems easily at the click of a few buttons.
Intricate steps to obtain results for other algebraic conversations such as fractions, permutation and combination, standard deviation, table function etc. can be avoided since the user-friendly built of this Casio Calculator makes it easy to get quick results to these operations. Market researchers, data collectors and data analysts can easily carry out paired -variable statistics regression analysis, standard deviation and other operations related to organized collection and preservation of data using this Casio FX991ES. The List-based STAT data editor makes viewing and editing of input data in list format and shows data groups with x-data, y-data and frequency and surrounding data.
The Multi-replay function makes it easy to obtain quick and easy recall of previously executed formulas for editing and re-execution. The Dot Matrix Display features a high-resolution screen, providing beautiful looking graphs every time.
Logarithmic log, table function and logical operations make calculations easy, quick and convenient. This Casio Calculator has 40 stored scientific constants, which come into effect while carrying out these calculations. Data and information is stored on 9 variable memories and there are 20 pairs of metric conversions available.
The two way power system is capable of using battery as well as solar power for the calculator thus making optimum usage. This Casio Calculator comes with a new slide on hard case, which makes working on the calculator convenient and protects it from scratches and other impacts.
With its wide variety of features and specifications, this Casio FX991ES is used extensively by students and other professionals in course of their daily routine. The user-friendly and budget-friendly nature of this Casio Scientific Calculator makes it a good buy.
|Power Source||Battery and Solar|
|3 Year Casio India Warranty and Free Transit Insurance.|
I have been using the Casio FX991ES for the past 4 yrs. Its a gr8 device for engg. students. The greatest feature is the natural notebook display which allows the user to write fractions and functions in a natural manner.
For just 100-150 bucks more than the 991MS model its a significant improvement with more memory, larger display, gr8tr function(ex:log10 and u can store stat tables) and easy and quick operations (very helpful during exams).
Bottomline: go for it !!!!
I felt that it is the best klc for engineering students @ very affordable price with trust of flipkart.
Its operations are user friendly & provides much graphical interface.
I bought it 4 years before @ 620/-
Now of course Flipkart is always the best! I've been a regular customer and never have they let me down. Rock bottom prices and lightning speed deliveries!
The Casio FX991ES is master piece. Once you start using it to the max, you realize that the returns are many times higher than what you paid to buy it!
The natural number display, the plethora of functions and the smooth finish of the product make you a proud owner of one of the finest pieces of technology.
Must have for most of the students. But beware that official university exams do not permit the use of these models in the examination hall!
Best calculator i have ever used. natural notebook dishplay makes easy to write fraction,solution of equations, matrix,integration, differentiation etc.
user friendly platform
it has memory to store values
This calculator is like a perpetual motion machine. It never needs a battery! (Although I did get the battery that came with it after six months of purchase). Since then, There has been no battery issue. In first six months of Engineering, we don't use the calculator that much, but the battery needed to be replaced. But after that, I have been using it extensively (to the point of doing calculations like 15+7=22 :P along with the engineering functions
The most useful functions for engineering students are
2. Differentiation (only definite integrals and differentials)
3. Equation solving upto 3rd order. Although it can solve equation in single variable of any order, it takes a lot of time.
4. Table function
5. Matrix simplifications (you can't live without them)
6. Storing Data in 6 memory locations as constants and using them for further simplification. (Very useful!!)
7. Complex mode and all the related simplification. (I would flunk my engineering without this!!)
8. Trigonometric functions and Binary-Hex-Oct-Decimal Conversion modes.
These are invariable, whenever a simple problem comes up, we simply seek out our trusted casio calculator. Without which I don't know how I would have managed.
Seriously, Casio needs to be awarded with something for making such a reliable product.
You don't even have to worry about your battery dying out. As long as you have a little bit if ambient light, the claculator will come to life, even if your battery has no juice in it.
I expect our modern day smart phones to function with such energy efficieny. But thats a bit too hopeful of me!!
this is the best calculator an engineer as well a CA aspirant can have..I had a MS990 earlier but when I got this I got amazed...Read More
THIS CALCULATOR IS NOT ALLOWED IN THE UNIVERSITY EXAMS! Go for 991ms if you do not want to buy another calculator just for the...Read More
Useful for students preparing for engineering or other maths based exams. It saves lot of time involved in lengthy calculations...Read More
I have been using this calculator for over four years and it had the capacity to do whatever I wanted it to do and more - you n...Read More