-> (1-cos² x) cotan² x =
-> sin x-2 sin²x / 2 cos³x-cos x =
Bantu jawabb, kawan…
Jawaban Terkonfirmasi
(1 – cos² x) .cotan² x = sin² x . cos² x / sin² x
= cos² x
(sin x – 2 sin² x) / (2.cos³ x – cos x) = [sin x (1 – 2sin x)] /cos x (cos² x – 1)
= [sin x ( 1 – 2sin x)] / cos x . (- sin² x)
= (1 – 2sin x) / – sin x.cos x
= (1 – 2.sin x) / – 1/2 .sin 2x
= – 2 (1 – 2sin x) / sin 2x