# How to Use a Scientific Calculator

A scientific calculator is necessary and efficient in helping with complex mathematical problems. However, this calculator may be a bit confusing when first used. Before using it in the exam for the first time, be sure to know where all the buttons are and how to operate every function you need. You can read this article.

1. Look for important functions. There are various functions in the calculator that are important for Algebra, Geometry, Trigonometry, Calculus, and more. Find the following functions on the calculator (the labels may be different for each calculator). Some functions may require you to press the Fn or Shift key to access it:

2. Specify the order of use of the keys. Function keys are widely used on the numbers entered. Some calculators will perform functions on numbers already entered, while some other calculators will do so on the next number entered.

3. Try a simple square root. Test the sequence of buttons on an easy and fast problem. For example, do the square root of 9. You already know the answer three, so this way is suitable to be used to find out the order of the use of buttons on the calculator.

– Press 9 then the root key. If nothing happens, press root then press 9.

– Some calculators will add parentheses for calculations, for example, root (3. You must add a closing parenthesis) before completing the calculation.

– You may have to press = key to see the result.

4. Take the rank of a number. Another test to find out the sequence of buttons is to use the function y x. Since this test involves two numbers, you must ensure the order of use of the key. Do a simple test, for example, 2 root 3. If the answer is 8, that’s the right sequence. If the result is 9 then you have counted 3 root 2.

5. Use trigonometric function. When you use the COS, SIN, or TAN functions, there are two different things to keep in mind: the sequence of key usages, and the radians or degrees function. Use a simple SIN function with a memorable answer. For example, the sin of 30 ° is 0.5. Decide whether you should enter 30 or press sin first. See your answer. If the result is 0.5, the calculator is set to display in degrees. If the answer is -0.988, the calculator is set to radians. Look for the Mode button to switch between degrees and radians.