Jawaban:
1
Penjelasan dengan langkah-langkah:
sin 330=sin(360-30)=-sin 30=-1/2
sin 240=sin(270-30)=-cos 30=-1/2√3
cos 210=cos(180+30)=-cos 30=-1/2√3
cos 300=cos(360-60)=cos 60=1/2
-1/2 + -1/2√3
------------------
-1/2√3-1/2
=-√3
---------
-√3
=1
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Verified answer
Jawaban:
1
Penjelasan dengan langkah-langkah:
sin 330=sin(360-30)=-sin 30=-1/2
sin 240=sin(270-30)=-cos 30=-1/2√3
cos 210=cos(180+30)=-cos 30=-1/2√3
cos 300=cos(360-60)=cos 60=1/2
-1/2 + -1/2√3
------------------
-1/2√3-1/2
=-√3
---------
-√3
=1