Bukti identitas trigonometri SinA =1/cosecA

Kelas 10 Matematika
Bab Trigonometri

sin A = y/r
cos A = x/r
tan A = y/x
cosec A = r/y
sec A = r/x
cotan A = x/y

sin A = y/r
sin A = y/r . (r/y) . (r/y)
sin A = 1 / (r/y)
sin A = 1/cosec A


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