x∈R:cos⁡2x+2cos2⁡x=2 is equal to

xR:cos2x+2cos2x=2 is equal to

  1. A

    2nπ+π3:nZ

  2. B

    nπ±π6:nZ

  3. C

    nπ+π3:nZ

  4. D

    2nππ3:nZ

    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 have

    cos2x+2cos2x=2 4cos2x=3cos2x=cos2π6x=nπ±π6,nZ

    Chat on WhatsApp Call Infinity Learn

      Register to Get Free Mock Test and Study Material

      +91

      Verify OTP Code (required)

      I agree to the terms and conditions and privacy policy.