PiCalc is a free online scientific calculator. It has simple interface, but it does has some useful functions. First of all, it lets you define values of some variables, and then use them in your calculations. Like, you can define values for “A” and “B”, and create a calculation like “A*B”. Apart from this, it provides a full function list for Trignometric functions, basic functions, Logarithm functions, exponent functions, and more. The best part is that you can click on any function in the list to directly use in your calculation.
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