Question
Download Solution PDFcos 2A cos 2B + sin2(A - B) - sin2(A + B) चे मूल्य शोधा
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेल्याप्रमाणे:
cos 2A cos 2B + sin2(A - B) - sin2(A + B)
वापरलेली संकल्पना:
cos (a + b) = cos a cos b - sin a sin b
sin2a - sin2b = sin(a + b) sin(a - b)
गणना:
cos 2A cos 2B + sin2(A - B) - sin2(A + B)
⇒ cos 2A cos 2B - [sin2(A + B) - sin2(A - B)]
{sin2a - sin2b = sin(a + b) sin(a - b)}
⇒ cos 2A cos 2B - [sin(A + B + A - B) sin(A + B - A + B)]
⇒ cos 2A cos 2B - [sin(A + A) sin(B + B)]
⇒ cos 2A cos 2B - sin 2A sin 2B
⇒ cos (2A + 2B)
∴ आवश्यक उत्तर cos (2A + 2B) आहे.
Last updated on Jun 13, 2025
-> The SSC CGL Notification 2025 has been released on 9th June 2025 on the official website at ssc.gov.in.
-> The SSC CGL exam registration process is now open and will continue till 4th July 2025, so candidates must fill out the SSC CGL Application Form 2025 before the deadline.
-> This year, the Staff Selection Commission (SSC) has announced approximately 14,582 vacancies for various Group B and C posts across government departments.
-> The SSC CGL Tier 1 exam is scheduled to take place from 13th to 30th August 2025.
-> Aspirants should visit ssc.gov.in 2025 regularly for updates and ensure timely submission of the CGL exam form.
-> Candidates can refer to the CGL syllabus for a better understanding of the exam structure and pattern.
-> The CGL Eligibility is a bachelor’s degree in any discipline.
-> Candidates selected through the SSC CGL exam will receive an attractive salary. Learn more about the SSC CGL Salary Structure.
-> Attempt SSC CGL Free English Mock Test and SSC CGL Current Affairs Mock Test.
-> Candidates should also use the SSC CGL previous year papers for a good revision.