tolong ya bantuan x.. buat PR bsok

Nilai fungsi trigonometri

cos 60 = 1/2
sec 30 = 1/cos 30  = 1/ ( 1/2 √3) = ²/₃ √3
tan 45 = 1
sin 30= 1/2
cos 30 = ¹/₂ √3

{2 (cos 60)² + 4 (sec 30)² - (tan 45)²}/ {(sin 30)² + (cos 30)²} =
= [2(¹/₂)² + 4 (²/₃√3)² - (1)² ]  /(1)
= ( 2(1/4) + 4(4/3) - 1) / (1)
= 1/2 + 16/3 -1
= 4⁵/₆..