Free Online Trigonometry Calculator

Easy online calculator or converter, just type in any field below and the answer appears.
Use Sine (Sin), Cosine (Cos), Tangent (Tan), Arc Sine (ASin), Arc Cosine (ACos), Arc Tangent (ATan)
and our Chihuahua says ... "Happy Chi-Calculating!"

Arithmetic + - * / 2 + 2 - 3 (3 * 5) / 2 1 7.5 Roots & powers sqrt(9) 5^2 3 25 Percent 5% 100 * 17% 20 + 50% 0.05 17 30 Constants PI E 3.14159... 2.71828... Degrees & radians (degrees by default) 30 30 deg PI rad 30 30 180 sin, cos, tan asin, acos, atan sin(30) sin(PI/4 rad) 0.5 0.707... e^x Natural Log (ln) Log base 10 (log) exp(2) E^2 ln(2) log(2) 7.389... 7.389... 0.693.. 0.301...

Handheld Calculators

Which trigonmetry calculator is right for me? Feature and price comparison for graphing to trigonometry calculators.

• • Preloaded Apps
  • Color Screen
  • SD Card Combatible
  • Infrared Port
• • AP
  • SAT
  • PSAT/NSMQT
  • Act
• • $0-$50
  • $50-$75
  • $75-$100
  • $100+

• Casio Algebra FX 2.0 series

  
  
  In my opinion a very professional product from CASIO: It has a very large screen that makes it really easy to read the data on the display. It has the ability to solve linear equations with up to 30 l ... read more In my opinion a very professional product from CASIO: It has a very large screen that makes it really easy to read the data on the display. It has the ability to solve linear equations with up to 30 linear equations which is amazing. It also can use differential equations software which provides the ability to solve most of the differential equations very quickly. It is quite suitable for math students. It can be easily connected to the computer and you can transfer the software you like to it. Also it is possible to connect two of them for transferring data. I forgot to say that it also has complex functions that really fit to engineering and math requirements. If I want to explain it in few words I would say that it is a device which is really handy for your simple or difficult calculations.  hide

• TI-Nspire CAS

  
  
  I had this calculator for a while, and I must say, I am quite pleased with it. It has helped me much during my math studies and science projects, providing fast launch and easy access to functions wi ... read more I had this calculator for a while, and I must say, I am quite pleased with it. It has helped me much during my math studies and science projects, providing fast launch and easy access to functions within it. At the first look the device may seem like a “computer” to those who are not quite focuses with their academic studies. Often critisms from others may include “That thing is huge!” and “How much did you pay for that?!?” alongside “Bro, that is a computer!”. In all honesty, these are only some of the “effects” that come with owning such a device. The nSpire CAS’s constriction is fairly sturdy and rigid. When you tuck the calculator away in a loose spot, the outer case seems to detach on it’s own and slide around the backpack. Unfortunately, this led to a little incident where a single pixel on the screen got punctured. The buttons are easy to speed-feel and easily recognizable. The keypad is NOT a QWERTY keypad, but over time, it performs quite well with fast button mashing and variable naming. Texas Instruments really did make a good effort on the new keypad layout to be user-friendly. On the older models, the keys were scattered all around and usage was fairly complex to handle. Many problems were corrected in this new device. It should also be known that the device comes with two battery compartments, one under the keypad and another on the back. It take the standard four AAA batteries to power the device, but this can also be combo’d with a proprietary Texas Instrument nSpire rechargeable battery. A nice (and oblivious) feature on the new nSpire is the inclusion of a touchpad. Although it may seem nice, you might not even use it often unless you work with geometry a lot. Otherwise, the standard up/down/left/right is the norm for controlling the device. (It should also be noted that to use the touch-pad, you must wiggle your finger around for a but for the cursor to appear. Not quite convenient, I might say.) Battery life is pretty decent. I only had to replace the batteries once per six months. Me gusta mucho! Something I also find quite lethal on the design part is the keypad and the AAA batteries being close to each other. If the batteries are slightly bulging or bigger than normal, it may push the contacts on the keypad up and crash the calculator, causing a potential to corrupt the data on the device. Another pro of this device is the screen resolution. Even though it is black and white, it provides accurate detail when it comes to graphing equation, out-performing the TI-84 in ease-of-readability and usage.  hide

• TI-89

  
  
  I was using a TI-83 and 84 throughout most of my high school career but once I got to college, the three calculus courses I had required the use of the TI-89. I can now see why my high school didn't w ... read more I was using a TI-83 and 84 throughout most of my high school career but once I got to college, the three calculus courses I had required the use of the TI-89. I can now see why my high school didn't want anyone to use a TI-89. There is just so much more that the calculator can do than a 83 or 84. Most standardized tests such as AP exams and SAT examination did not allow us to use the calculator either because it is programmable and can derive functions for you and the TI 83 and 84 did not allow it. It doesn't take long to learn the basic calculus functions like integrals and derivatives. The provided manual does a good job of explaining how most of the functions work and is a good guide to come back to if you are confused. I do recommend you go with someone who understands how to use it or read the manual because its not as straight forward to use it as the 83 and 84 were but I guarantee it is much more useful for a college student studying mathematics, engineering or any major heavy on calculus courses. While a TI-83 or 84 can do most of what this calculator can do, it becomes a lot easier once you start using the TI-89. I would recommend the TI-89 to anyone going into college that will have to take multiple calculus courses.  hide

• TI-83 Plus

  
  
  The TI 83 can do pretty much what every calculator out there does, and does a lot more. It plots graphs, solves equations, does calculations to a lot of decimal points and much more. It is a very bulk ... read more The TI 83 can do pretty much what every calculator out there does, and does a lot more. It plots graphs, solves equations, does calculations to a lot of decimal points and much more. It is a very bulky calculator. Well bulky in the sense that it is very long (tall) and it is a bit beefy thickness wise, but most texas instrument and casio calculators are bulky and if you are going to take frequent math courses, you’ll need to get used to the appearance . It can still fit in a pocket though, although it will occupy a lot of space. I would not really say this calculator is easy to use, but it’s straight forward. Sure, you can do addition and subtraction, multiplication and division on it since the keys are all the same as other calculators. But in order to do complex calculations and graphing is it really that intuitive? No, definitely not. You will either have to consult a professor or a student who is familiar with this calculator or read the manual a bit. It is true though that once you know it and get in the grind of things the TI-83 will be more straightforward. I suggest you get this calculator if you are learning high school level algebra, geometry, trigonometry, and algebra II once you start pre-calculus you should start thinking of upgrading to the TI 84 or 89 if you feel like you’re going to continue taking intensive math courses.  hide