cot2a - csc2a = help please
Matematika
syafiq0789
Pertanyaan
cot2a - csc2a =
help please
help please
1 Jawaban
-
1. Jawaban prianandalbs
cot² a - csc² a
= (1/tan² a ) - (1/sin² a)
= (cos² a/sin² a) - (1/sin² a)
= ( cos² a - 1 )/sin² a
= - (1 - cos² a) / sin² a
= - sin² a / sin² a
= -1