Introduction - If you have any usage issues, please Google them yourself
Enter the expression string to " =" indicates the end of the calculation and the output value of the expression. Operand can be an integer or a real number, the operator has " +" , " -" , " *" , " /" , " ^" (power) and " sin ()" (sine), " cos ()" ( cosine), " log ()" (logarithmic), " ln ()" (natural logarithm) and other functions.