Jawabanmu

2014-03-25T07:41:55+07:00
Pake rumus identitas aja
sin²α + cos² α = 1
cos²α  = 1 - sin²α
1 + tan²α = sec²α
sec²α -1 = tan²α
2014-03-25T08:00:11+07:00
Harus pakai rumus identitas
sin²α + cos² α = 1
cos²α  = 1 - sin²α
1 + tan²α = sec²α
sec²α -1 = tan²α