(1 - cos x)/(sin x) = tan x/2
Matematika
cinderbellas
Pertanyaan
(1 - cos x)/(sin x) = tan x/2
1 Jawaban
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1. Jawaban Anonyme
TriGonoMetRi
cos x = cos 2(1/2 x) = 1 - 2 sin² (x/2)
sin x = sin 2(x/2) = 2 sin (x/2) cos (x/2)
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(1 - cos x)/sin x
= 2 sin² (x/2) / 2 sin (x/2) cos (x/2)
= sin (x/2) / cos (x/2)
= tan (x/2)
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