sederhanakanlah bentuk persamaan berikut a) cos x .csc x .tan x b)cos x .cot x .sin x c) (csc 0-cot 0)x(1 + cos 0)

a. cos x . csc x . tan x
= cos x . 1 / sin x . sin x / cos x
= cos x / sin x . sin x / cos x
= 1

b. cos x . cot x . sin x
= cos x . cos x / sin x . sin x
= cos^2 x

c. (csc 0 - cot 0) . (1 + cos 0)
= (1/sin 0 - cos 0/sin 0) . ( 1 + cos 0)
= { ( 1 - cos 0) / sin 0 } . ( 1 + cos 0 )
= ( 1 - cos 0) . ( 1 + cos 0 ) / sin 0
= ( 1 - cos^2 0 ) / sin 0
= sin^2 0 / sin 0
= sin 0