[tex]2( \tan(45)) + ( \cos(30)) -( \sin(60))^{2} = [/tex]

jawab

= 2 ( 1 + 1/2  - 1/2 √3)²

= 2 (3/2  - 1/2 √3)²

= 2 (1/4)( 3 - √3)²

= 1/2 (9 +3 - 6√3)

= 1/2 (12 - 6 √3)

= 1/2 (6)(2 - √3)

= 3 (2 - √3)