Why Changing to Tangent Fails here❌ | Trigonometry Explained скачать в хорошем качестве

Why Changing to Tangent Fails here❌ | Trigonometry Explained

Why doesn’t changing everything to tangent work in this trigonometric equation? Many students automatically divide by cos θ and change to tan θ — but in this question, that method completely fails. In this video, we solve 10cos θ + 5sin θ = 6 and explain why tangent does NOT work, and when R-formula is required instead. This is a very common mistake in secondary school trigonometry exams. In this lesson, you will learn: 📌Why changing to tangent sometimes fails 📌When you must use the R-formula 📌How to recognise mixed sin θ and cos θ equations 📌How to approach trigonometric equations without diagrams Topics covered: 📘 Trigonometric equations 📘 R-formula 📘 Common exam mistakes 📘 Sin and cos equations How to express R-formula :    • The Secret behind R Formula! 🤯   👉 Watch till the end to understand the decision process — not just the method. #RFormula #trigonometry #0levels