(tan 30°+cotan 30°)sin 30°×cos30°

(1/√3+√3)1/2.√3/2 =
(1/√3+3/√3)1/2.√3/2 =
(4/√3)1/2.√3/2 = 
2√3.√3/2 = 
1
semoga membantu dan benar