Differentiate ecos x  with respect to x?

This question was previously asked in
Army Havildar SAC 2025 Mock Paper
View all Army Havildar SAC Papers >
  1. - ecos x  sin x
  2. - ecos x  cos x
  3. 2ecos x  sin x
  4. - esin x sin x

Answer (Detailed Solution Below)

Option 1 : - ecos x  sin x
Free
Army Havildar SAC - Quick Quiz
2 K Users
5 Questions 10 Marks 6 Mins

Detailed Solution

Download Solution PDF

 

 

Calculation:

Let y = ecos x.

Using the chain rule:

  y' = \( \frac{d}{dx} e^{\cos x} \) 

⇒ \( y' = e^{cos x } \frac{d}{dx} \cos x \)

\(y' = -e^{\cos x} \sin x \)

Conclusion:

∴ The derivative of ecos x with respect to x is:  -ecos x × sin x

Correct Answer: Option 1

Latest Army Havildar SAC Updates

Last updated on Jul 1, 2025

-> The Indian Army has released the Exam Date for Indian Army Havildar SAC (Surveyor Automated Cartographer).

->The Exam will be held on 9th July 2025.

-> Interested candidates had applied online from 13th March to 25th April 2025.

-> Candidates within the age of 25 years having specific education qualifications are eligible to apply for the exam.

-> The candidates must go through the Indian Army Havildar SAC Eligibility Criteria to know about the required qualification in detail. 

Get Free Access Now
Hot Links: teen patti flush teen patti master 2025 teen patti download apk teen patti baaz