2sec2θ(1−tanθ)2\frac{2 \sec ^{2} \theta}{(1-\tan \theta)^{2}}(1−tanθ)22sec2θ
−2sec2θ(1+tanθ)2\frac{-2 \sec ^{2} \theta}{(1+\tan \theta)^{2}}(1+tanθ)2−2sec2θ
−2sec2θ(1−tanθ)2\frac{-2 \sec ^{2} \theta}{(1-\tan \theta)^{2}}(1−tanθ)2−2sec2θ
−(1+tanθ)22sec2θ\frac{-(1+\tan \theta)^{2}}{2 \sec ^{2} \theta}2sec2θ−(1+tanθ)2