Question

URGENT !
JAWAB DALAM 10 MENIT PLEASE

2 cos (60+x) berapa ?
jawabannya yang bener please :3

Answer 1

cos(α + β) = cos(α)cos(β) – sin(α)sin(β) 
cos (60+x) = cos(60)cos(x) – sin(60)sin(x) 
1/2cosx-1/2V3sinx=1/2(cosx-V3sinx)
2cos(60+x)=2*1/2(cosx-V3sinx)
=(cosx-V3sinx)