hitunglah nilai tan 60° - tan 30° / 1 + cos 60°

jawab

tan 60 = √3
tan 30 = 1/√3
cos 60 = 1/2

(tan 60 - tan 30)/(1 + cos 60) =

= (√3 - 1/√3) / (1 + 1/2) ...kalikan √3

= (3 - 1)/( √3 + 1/2 √3)

=  2 / (3/2 √3) ....kalikan √3

= 2 √3 /( 9/2)

= 1/9 √3