Click on the following link for an online scientific calculator

main shows the keypad, basic trig functions, Natural Log, along with fractions, radicals, exponents, and Pi. Click on func for inverse trig functions, e to a power, and Common Log. Make sure it’s set on Rad or Deg correctly when dealing with the trig functions. Clear all on the right hand side clears the screen to start over or with a new problem: https://www.desmos.com/scientific