Question
Download Solution PDF(1 - sinA)2 + (1 + sinA)2 + (1 - cosA)2 + (1 + cosA)2 எதற்குச் சமம்?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFகொடுக்கப்பட்டவை,
(1 - sinA)2 + (1 + sinA)2 + (1 - cosA)2 + (1 + cosA)2
⇒ 1 + sin2A – 2 sinA + 1 + sin2A + 2 sinA + 1 + cos2A – 2 cosA + 1 + cos2A + 2 cosA (∵ (a ± b)2 = a2 ± 2ab + b2)
⇒ 1 + sin2A + 1 + sin2A + 1 + cos2A + 1 + cos2A
⇒ 4 + 2 (sin2A + cos2A)
⇒ 4 + 2 = 6 (∵ sin2A + cos2A = 1)
Last updated on Jul 18, 2025
-> A total of 1,08,22,423 applications have been received for the RRB Group D Exam 2025.
-> The RRB Group D Exam Date will be announced on the official website. It is expected that the Group D Exam will be conducted in August-September 2025.
-> The RRB Group D Admit Card 2025 will be released 4 days before the exam date.
-> The RRB Group D Recruitment 2025 Notification was released for 32438 vacancies of various level 1 posts like Assistant Pointsman, Track Maintainer (Grade-IV), Assistant, S&T, etc.
-> The minimum educational qualification for RRB Group D Recruitment (Level-1 posts) has been updated to have at least a 10th pass, ITI, or an equivalent qualification, or a NAC granted by the NCVT.
-> Check the latest RRB Group D Syllabus 2025, along with Exam Pattern.
-> The selection of the candidates is based on the CBT, Physical Test, and Document Verification.
-> Prepare for the exam with RRB Group D Previous Year Papers.