Search for: x∈R:cos2x+2cos2x=2 is equal tox∈R:cos2x+2cos2x=2 is equal toA2nπ+π3:n∈ZBnπ±π6:n∈ZCnπ+π3:n∈ZD2nπ−π3:n∈Z Register to Get Free Mock Test and Study Material +91 Verify OTP Code (required) I agree to the terms and conditions and privacy policy. Solution:We havecos2x+2cos2x=2⇒ 4cos2x=3⇒cos2x=cos2π6⇒x=nπ±π6,n∈ZPost navigationPrevious: If ∑i=19 xi−5=9 and ∑i=19 xi−52=45, then the standard deviation of the 9 items xi,x2,…,x9 isNext: The solution of the equation 1−cosθ=sinθsinθ2 isRelated content JEE Main 2023 Question Papers with Solutions JEE Main 2024 Syllabus Best Books for JEE Main 2024 JEE Advanced 2024: Exam date, Syllabus, Eligibility Criteria JEE Main 2024: Exam dates, Syllabus, Eligibility Criteria JEE 2024: Exam Date, Syllabus, Eligibility Criteria NCERT Solutions For Class 6 Maths Data Handling Exercise 9.3 JEE Crash Course – JEE Crash Course 2023 NEET Crash Course – NEET Crash Course 2023 JEE Advanced Crash Course – JEE Advanced Crash Course 2023