Question

Cos (pangkat 2) beta - Sin (Pangkat2) beta
--------------------------------------------------- Sec (pangkat 2) beta - Tan (pangkat2) Beta

Answer 1

1 .cos^2 b - sin^2 b=
berdasarkan identitas trigonometri : sin^2 b + cos^2 b = 1
maka cos^2 b -sin^2 b = -(sin^2 b + cos^2 b)= -1

2. identitas trigonometri :
sec^2 b - tan^2 b = 1