If trigonometry ever felt confusing, this lesson will finally make SOH CAH TOA clear. In this video, I explain the simplest way to understand sine, cosine and tangent for right triangles — perfect for Grade 9, GCSE, MYP, and anyone learning trig for the first time. You will learn: • What sin, cos and tan actually mean • How to identify opposite, adjacent and hypotenuse • How to use SOH CAH TOA correctly every time • How to find missing sides and missing angles • The most common mistakes students make • Fast, easy examples that make trig feel simple By the end of this lesson, you will know exactly when to use sine, cosine or tangent and how to set up every trig equation with confidence. ------------------------- TIMELINE 00:00 Intro 00:20 Right triangle basics 00:50 Opposite, Adjacent, Hypotenuse 01:30 Sine (SOH) 02:20 Cosine (CAH) 03:10 Tangent (TOA) 04:00 How to choose the correct ratio 05:00 Solving for missing sides (examples) 06:30 Solving for missing angles 08:00 Mixed practice examples 09:20 Final summary + tips ------------------------- HOMEWORK 1. sin(θ) = 7/10. Find θ, nearest degree. 2. Opposite = 9, hypotenuse = 15. Find sin(θ). 3. Adjacent = 12, hypotenuse = 13. Find cos(θ). 4. A ramp makes a 22° angle with the ground. Ramp length = 5 m. How high is the platform? 5. Opposite = 7, adjacent = 24. Find tan(θ). ------------------------- I’m Maryam — international school math teacher. I don’t sugar-coat algebra; I show you the tricks, the traps and how to win. 📧 For personalized practice or one-on-one tutoring: maryam_nr71@ I work with students worldwide to build confidence in algebra and beyond. Subscribe for more math tricks like this!