Question

Cos60+sin150-tan135=...
Tolong jwb pke cara'y

Answer 1

Cos 60 + cos 150 - tan 135 = 
= cos 60 + cos(180-30) - tan(180-45)
= cos 60 + (- cos 30) - (- tan 45)
= 1/2  + (- 1/2√3) - (-1)
= 1/2 - 1/2√3 - 1
= - 1/2 - 1/2√3
= - 1/2 ( 1 +√3)