Thjeshto secilën prej shprehjeve të mëposhtme.

a) $1+\tan^2(\theta/2)$ b) $(\sec\theta-1)(\sec\theta+1)$ c) $\tan^2\theta(\operatorname{cosec}^2\theta-1)$ d) $(\sec^2\theta-1)\cot\theta$ e) $(\operatorname{cosec}^2\theta-\cot^2\theta)^2$ f) $2-\tan^2\theta+\sec^2\theta$ g) $\frac{\tan\theta\sec\theta}{1+\tan^2\theta}$ h) $(1-\sin^2\theta)(1+\tan^2\theta)$ i) $\frac{\operatorname{cosec}\theta\cot\theta}{1+\cot^2\theta}$ j) $\sec^4\theta-2\sec^2\theta\tan^2\theta+\tan^4\theta$ k) $4\operatorname{cosec}^2 2\theta+4\operatorname{cosec}^2 2\theta\cot^2 2\theta$