a. -1
b. 0
c. 1
d. sin^2 x
e. sec^2x
2. (tan x – sec x) (sin x +1)=…
a. -cos x
b. -tan x
c. sin x
d. cos x
e. 1- cos x
3. cos x/1 – sin x=…
a. sec x + tan x
b. sec x – tan x
c. sec x + cotan x
d. cosec x + cotan x
e. cosec x – cotan x
mohon bantuannya ya.. sama caranya juga ya 🙂
1. tan^2 x – sin^2 x / tan^2 x sin^2 x =….
1. c. 1
2. (tan x – sec x)( sin x + 1) = (sin x - 1 )( sin x + 1)
cos x cos x
= ( sin x cos x – cos x) ( sin x + 1)
cos² x
= cos x ( sin x – 1) ( sin x + 1)
sin²x - 1
= cos x ( sin x – 1)( sin x + 1)
( sin x – 1) ( sin x + 1)
= cos x