In Excel while Calculating =SIN(PI()) formula it returns 1.22515E-16.If the PI() Value(3.14159265358979) is directly given like =SIN(3.14159265358979), it returns 3.23114E-15.
Please anyone can share your opinion about how the excel calculates differently, when 'PI' and 3.14159265358979 are passed as parameter.