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CBSE Class 12 Mathematics 2026 Supplementary Paper 65/7/1 · Q141 Markschain_rule

CBSE Class 12 Mathematics 2026 Supplementary Paper 65/7/1 · Question 14 (Continuity And Differentiability)

If \(y=\log\sqrt{\tan x}\), find \(dy/dx\) at \(x=\pi/4\).

✅ Step-by-Step Solution

Final Answer: 1
  1. Write y=(1/2)ln(tan x). Its derivative is sec²x/(2 tan x), which equals 1 at π/4.

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