nilai lim x mendekati 0 1 - cos2x / x tan2x

jawab

limit (x -> 0)  (1 - cos 2x ) / x . tan 2x

limit (x -> 0)  (1 - (1 - 2 sin² x) / x . tan 2x

limit ( x-> 0)  ( 2 sin x sin x ) ./ x . tan 2x

= 2 (x)(x)/ (x )(2x)
= 1