Question

Tolong dikasih pembuktiannya ya
jwb 1 nmr aja juga boleh thx..

Answer 1

Semoga membantu yaa......

Answer 2

Nomor 1
(tan^2 A - sin^2 A)
-----------------------------
(1 - sin^2 A)

((sin^2 A)/(cos^2 A) - sin^2 A)
-----------------------------------------
cos^2 A

(sin^2 A - sin^2 A cos^2 A)/(cos^2 A)
----------------------------------------------------
cos^2 A

sin^2 A (1 - cos^2 A)
-----------------------------
cos^2 A cos^2 A

sin^2 A . sin^2 A
------------------------
cos^4 A

sin^4 A
----------
cos^4 A

tan^4 A (terbukti)