Identitas Trigonometri
RUMUS IDENTITAS TRIGONOMETRI sin^2 x + cos^2 x = 1 1 + tan^2 x = 1/cos^2 x = sec^2 x tan x = sin x / cos x cot x = cos x/ sin x sec x = 1/ cos x csc x = 1/ sin x ces^2 = tan^2 x + 1 csc^2 x = cot^2 x + 1 DEMI, DESA, SAMI dan SINDIKAT TANGAN COSONG