Question

Tolong bantu jawab pakai cara yaaa

Answer 1

Verified answer

√(1 - cos x) / √(1 + cos x)
= √(1 - cos x) . √(1 - cos x) / √(1 + cos x) . √(1 - cos x)
= (1 - cos x) / √((1 + cos x)(1 - cos x))
= (1 - cos x) / √(1 - cos² x)
= (1 - cos x) / √sin² x
= (1 - cos x) / sin x
= 1/ sin x - cos x/sin x
= cosec x - cotan x