Jawabanmu

2014-05-31T18:42:53+07:00
2014-05-31T18:46:12+07:00
1. (sin x + tan x)/(cot x + cosec x ) = {sin x + (sin x / cos x) } / { (cos x / sin x ) + 1/sin x }
= {(sin x cos x + sin x)/ cos x } / { (cos x + 1)/sin x}
= { sin x (cos x + 1)/cos x} x {sin x / cos x + 1)
= sin²x / cos x atau tan x sin x

2. (1/2)² + (1/2 √3)² = 1/4 + 3/4
= 1 bisa menggunakan sin²x + cos² x = 1