Question
Download Solution PDFcos 24° + cos 55° + cos 125° + cos 204° + cos 300° = ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFకాన్సెప్ట్:
cos (180° + x) = -cos x
cos (180° - x) = -cos x
cos (360° - x) = cos x
సాధన:
cos 24° + cos 55° + cos 125° + cos 204° + cos 300°
= cos 24° + cos 55° + cos (180° – 55°) + cos (180° + 24°) + cos (360° - 60°)
= cos 24° + cos 55° - cos 55° - cos 24° + cos 60°
= cos 60°
= 1/2Last updated on Jun 18, 2025
->UPSC has 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.