Unfortunately many students are unaware of the capability of many calculator keys. Reciprocal of a fraction calculator: If you are struggling with how to find reciprocal of a fraction don't worry as you can take the help of our easy to use Reciprocal of a fraction calculator. In this animated object, learners follow step-by-step instructions on how to use the reciprocal function of a TI-89 scientific calculator. Remember that secant, cosecant, and cotangent are all reciprocals, but you typically won’t find a button for them on your calculator. The TI-89 Scientific Calculator: Using the Reciprocal Function By Patrick Hoppe. We press 5 x-1 = , and we get an answer of 0.2. So let's find the reciprocal of 5. Don’t get confused and use the sin –1, cos –1, and tan –1 buttons, either. Cosecant is the reciprocal of sine. This reciprocal button allows you to find the value of a reciprocal function when you’re working with a number. You must use their reciprocals — sine, cosine, and tangent. This is the first in an occasional series of posts that will help students learn how to make better use of the calculator. The reciprocal key can be found on the third row of … To find the cosecant of an angle using a calculator, find the sine of that angle (using the Sin button) and then divide 1 by the result. To […] Continue reading to know more about What is a Reciprocal of a fraction and how it … Square Roots There is also a special key for taking a square root. On scientific calculators, the –1 or x–1 button means to find the reciprocal of a number. Here’s what they are and how you use them: π and e The transcendental numbers π and e are respectively located in the fifth and sixth rows of the last column of the keyboard. But look under the 2nd functions, which are different functions or operations written above the buttons… In this video you will be shown where and how to use the reciprocal key on a Casio Classwiz fx-GT85x scientific calculator. If you want to take the square root of 81, press 2nd SQUARE 81 =, and the calculator will show you the result: 9. Calculators can be great assistants when doing math. Those buttons are … Starting with the fifth row of the TI-84 Plus calculator, you find the functions commonly used on a scientific calculator. It's the 2nd function of the SQUARE button.