Buktikan 5 sin^2 x + 3 cos^2 x = 2 sin^2 y + 3 Tlng djwb…

5 sin² x + 3 cos² x
= 2 sin² x + (3 sin² x + 3 cos² x)
= 2 sin² x + 3(sin² x + cos² x)
= 2 sin² x + 3 . 1
= 2 sin² x + 3

kayak gitu bukan