6cos^2x – 5sinx -7 =0 giúp mik vs ạ

6cos^2x – 5sinx -7 =0
giúp mik vs ạ

0 thoughts on “6cos^2x – 5sinx -7 =0 giúp mik vs ạ”

  1. C1:cos^2x = 1-sin^2x

    Để cho Z = sinx

    6(1-z^2) -5z-2=0

    -6z^2-5z+4=0

    C2:6 – 6sin²x – 5sinx – 2=0

    – 6sin²x – 5sinx + 4=0

    6sin²x + 5sinx – 4=0

    Bạn tham khảo nhé.

    Reply

Leave a Comment