November 2018 1 223 Report
Tanpa memakai tabel trigonometri atau kalkulator, hitunglah nilai eksak dari setiap bentuk berikut

a. sin 62° cos 28° + cos 62° + cos 28°
b. sin 140° cos 50° - cos 140° sin 50°
c. sin 37° cos 23° + cos 37° sin 23°
d. sin 69° cos 9° - cos 69° sin 9°
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