公式(微分)− 1 − 公式(微分) 導関数の定義 f′ (x) = lim h→0 f(x + h) − f(x) h = lim t→x f(t) − f(x) t − x 基本的関数の導関数 ( C )′ = 0 ( xα )′ = αxα−1 ( 1 xα )′ = − α xα+1 ( ex )′ = ex ( ax )′ = (log a)ax ( log x )′ = 1 x ( loga x )′ = 1 (log a)x ( sin x )′ = cos x ( cos x )′ = − sin x ( tan x )′ = 1 cos2 x = 1 + tan2 x ( 1 tan x )′ = − 1 sin2 x = −1 − 1 tan2 x ( sin−1 x )′