lim x→π/4 (1 - tanx) / (x - 4π) lim x tends to pi/4 1-tanx/x-pi/4 limx→4π(x−4π)(1−tanx). π/4 (1-tanx)/x-π/4 evaluate: lim(1-tan x)/(x-pi/4) when x→pi/4. #math #calculus