Basic Trigonometry | Basic Trigonometry | Trigonometry | Khan Academy


Introduction to trigonometry

Practice this lesson yourself on KhanAcademy.org right now:

Watch the next lesson:

Trigonometry on Khan Academy: Big, fancy word, right? Don’t be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry (“trig” as it’s sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It’s used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It’s not only space, however. Trig is present in architecture and music, too. Now you may wonder…how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you’ll learn the answer from us in these tutorials!

About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Trigonometry channel:

Subscribe to Khan Academy:

14 thoughts

  1. thank you so much for the soh cah toa! gosh i wish my teacher taught us that. she just went on and on making us memorize a/c and the rest without explaining why and when we had a quiz she flipped the triangles and i didn’t get it at all. also, her class feels like a nap time

  2. so where should i start? and can someone please tell me the right enumeration of the lessons? I’m self studying, because in my school they never teach us this. So please help me know how to learn trigo step by step. Thanks in advance! 🙂

  3. how to identify that the sin should be the one use? or how cos or tan should be use because im so confused rn on which among them to use

  4. Thank you so much I didn’t get a single thing in class but I understand everything here thank you so much

  5. The pain of studying for the ACT when you haven’t even reached Trig yet…I think you have just saved my life, good sir.

Comments are closed.