# Basic Trigonometry | Basic Trigonometry | Trigonometry | Khan Academy

Introduction to trigonometry

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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!

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## 14 thoughts

1. Nickolia Falvolf says:

The moment you realize that Khan academy is better than free college

2. Subhash Modak says:

Thank you very much

3. SueJi Bae says:

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

4. Mark Hermosa says:

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! 🙂

5. Jaian Aaliyah Francisco says:

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

6. David Gonzalez says:

Anyone else here for fun? I am

7. Nikita Verma says:

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

8. sreelatha raghu says:

well, sal u r the best well done. Keep it up

9. Robert Wells says:

Sa-Ka-Tas really ruined that mnemonic for me.

10. not JANS says:

Senpaii <3
Thanks a LOT 🙂

11. Piano Derp says:

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.

12. Smosher Belly says:

THANKS EVER SO MUCH THIS IS VERY HELPFUL!!!!!!!!!!!!!!! 🙂 <3