Sin30°+cos(-45°)+cosecan60°=
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Kelas 10 MatematikaBab Trigonometri
sin 30° + cos (-45°) + cosecan 60°
= 1/2 + 1/2 √2 + 1/sin 60°
= 1/2 + 1/2 √2 + 1/(1/2 . √3)
= 1/2 + 1/2 √2 + 2/3 . √3
= 3/6 + 3/6 √2 + 4/6 √3
= (3 + 3√2 + 4 √3)/6