यदि x = (cos π/14 + i sin π/14), y = (cos 9π/14 + i sin 9π/14) है, तो x5 ⋅ y15 का मान ज्ञात कीजिए। 

  1. ei ⋅ 5π
  2. ei ⋅ 15π
  3. ei ⋅ 10π
  4. इनमें से कोई नहीं 

Answer (Detailed Solution Below)

Option 3 : ei ⋅ 10π
Free
UPSC NDA 01/2025 General Ability Full (GAT) Full Mock Test
150 Qs. 600 Marks 150 Mins

Detailed Solution

Download Solution PDF

संकल्पना:

गणना:

दिया गया है: 

x = (cos π/14 + i sin π/14), y = (cos 9π/14 + i sin 9π/14)

चूँकि हम जानते हैं कि, 

 

हम x और y को निम्न रूप में लिख सकते हैं:

⇒ x = ei ⋅ π/14 और y = ei ⋅ 9π/14

⇒ x5 = ei ⋅ 5π/14 और y15 = ei ⋅ 135π/14

⇒  x5 ⋅ y15 = ei ⋅ 10π 

Latest NDA Updates

Last updated on Jul 8, 2025

->UPSC NDA Application Correction Window is open from 7th July to 9th July 2025.

->UPSC had extended the UPSC NDA 2 Registration Date till 20th June 2025.

-> A total of 406 vacancies have been announced for NDA 2 Exam 2025.

->The NDA exam date 2025 has been announced. The written examination will be held on 14th September 2025.

-> The selection process for the NDA exam includes a Written Exam and SSB Interview.

-> Candidates who get successful selection under UPSC NDA will get a salary range between Rs. 15,600 to Rs. 39,100. 

-> Candidates must go through the NDA previous year question paper. Attempting the NDA mock test is also essential. 

More Complex Numbers Questions

Hot Links: teen patti glory teen patti real teen patti real cash withdrawal teen patti master downloadable content teen patti master apk download