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Bismillahirrahmanirrahimmapel: matematika
jawabannya: a) 2 cos (x + π/6)
pembahasan nya:
√3 cosx - sinx
=2(½√3 cosx - sinx × ½)
=2(cos30cosx-sinxsin30)
=2cos(x+30)
=2cos(x+(π/6))