Google Graphs or Charts

I don't know if you have noticed this new cool and very much needed feature (for those who love maths) in Google. I came to know this today.
If you have studied maths at any point of time in your life, and have studied curves in mathematics, then this is for you. When we were in college, in order to realize what would be the shape of a particular linear equation graph, we had to solve it first.
Now recently Google has revealed this new feature wherein Google can plot the graph for you. And major thing is, the graphs generated are interactive enough that they have different colors for different graph equations, scale can be modified, just by using mouse you can zoom-in and zoom-out to graph.
So no need of specialized graph-plotting tools for simple single-variable equations.


To check out - go to google.com,
Type in your function for which you want to generate graph, 
e.g. cos(x) and press "Search".
You will see cosine function's graph is plotted. Isn't that amazing?


Not only it can plot the graph for basic equations but for complex equations like logarithm, square-root functions, trigonometry functions also can be easily seem to be working, like 


sqrt(6-x^2)+e^x+sin(x^2) 


Here is its graph - 



One more really nice feature you can have graph showing multiple functions (current max limit is 4, hope they will increase it), so if you have four different functions and want to plot the graph of them, then just separate them with comma and put them for search, it will give you the graph with different color for different functions.


Again giving limits for your graph view is possible, so that by default graph will be zoomed to given both values, if graph doesn't fall in given range it won't generate the graph.
e.g. 
sqrt(cos(x))*cos(300x)+sqrt(abs(x))-0.7)*(4-x*x)^0.01, sqrt(6-x^2), -sqrt(6-x^2) from -4.5 to 4.5
which would show default graph view from on X-axis -4.5 to +4.5, as you can see in following image.(as today its Valentine's Day)...

Here is one more such simple example, where I have given ranges for graph -4.5 to +4.5 (i.e. for first default view), but you can zoom-out/zoom-in to see other portions of the graph.



One more complex graph,




But there is one catch, currently Google only plots graphs for equations which have single variable in it, for 2 or more number of variables it won't generate graph. 
e.g. if you type x^2 + y^2, it won't generate the graph.
But basically its really nice for mathematics (geometry) learners to quickly visualize what would be the corresponding graph for given equation.

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