Jika v=cos a maka cos1/2 a adalah
Materi sudut pertengahan trigonometri SMA
Materi sudut pertengahan trigonometri SMA
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Verified answer
TriGonoMetRicos a = v
cos a = cos 2(1/2 a)
cos a = v
2 cos² 1/2 a - 1 = v
cos² 1/2 a = (1 + v)/2
cos 1/2 a = √((2 + 2v)/4)
cos 1/2 a = 1/2 √(2 + 2v) ✔