cos (π/3-2x) 求导

问题描述:

cos (π/3-2x) 求导

f(x) = cos(π/3-2x)
f ' (x) = - sin(π/3-2x) * (-2) = 2sin(π/3-2x)
用到的公式:
f(x) = cosx 则 f ' (x) = - sinx