If t, n, t´, n´ are the lengths of tangent, normal, subtangent & subnormal at a point P…
Mathematics · JEE Main · NTA Exams — Limit, Continuity and Differentiability
If t, n, t´, n´ are the lengths of tangent, normal, subtangent & subnormal at a point P (x1, y1) on any curve y = f (x) then
- t2 + n2 = t´n´
- \(\frac{1}{\mathrm{t}^{2}}+\frac{1}{\mathrm{n}^{2}}=\frac{1}{\mathrm{t}^{\prime} \mathrm{n}^{\prime}}\)
- t´n´ = tn
- nt´ = n´t
Answer
(B) 1 t ^ 2 + 1 n ^ 2 = 1 t ^ n ^
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