Question 7 - CBSE Class 12 Sample Paper for 2026 Boards - Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Last updated at Aug. 26, 2025 by

This question is exactly same as Ex 5.1, 28 – Chapter 5 Class 12 NCERT Book – Continuity and Differentiability

Please check the answer here

https://www.teachoo.com/3774/697/Ex-5.1--28---Find-k-so-that-f(x)----kx---1--cos-x-at-x--pi/category/Ex-5.1/

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Question 7 If a function defined by 𝑓(𝑥)={■(𝑘𝑥+1,&𝑥≤𝜋@cos 𝑥,&𝑥>𝜋)┤ is continuous at 𝑥=𝜋, then the value of 𝑘 is (A) 𝜋 (B) (−1)/𝜋 (C) 0 (D) (−2)/𝜋 This question is exactly same as Ex 5.1, 28 – Chapter 5 Class 12 NCERT Book – Continuity and Differentiability Please check the answer here https://www.teachoo.com/3774/697/Ex-5.1--28---Find-k-so-that-f(x)----kx---1--cos-x-at-x--pi/category/Ex-5.1/ So, the correct answer is (D)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 15 years. He provides courses for Maths, Science and Computer Science at Teachoo