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8:39
YouTube
MathematicsMadeSimple
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 ...
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