CBSE Class 12 Mathematics 2026 Main Paper 65/5/1 · Q81 Marksinverse_trig_derivatives
CBSE Class 12 Mathematics 2026 Main Paper 65/5/1 · Question 8 (Continuity And Differentiability)
Differentiate arccos((sin x+cos x)/√2) for −π/4<x<π/4.
✅ Step-by-Step Solution
Final Answer: −1
- The argument is cos(x−π/4). On the given interval the principal inverse cosine is π/4−x.
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