1. \(\cfrac{2 tan^2⁡ 30°}{1-tan^2⁡ 30°} \) \(+ sec^245° \) \(- cot^2 45°\) \( = sec60°\)

2. দেখাও যে,
\(\cfrac{2 tan^2⁡30°}{1-tan^2⁡30°} + sec^2⁡45° - cot^2⁡45° \) \(= sec60°\)

3. \(\cfrac{2 tan⁡ 30°}{1-tan^2⁡ 30°} = √3\)

4. \(\cfrac{2tan30°}{1-tan^230°}+cos^230°-sin^230°\)\(-cos^245°\) = ?

(a) \(\sqrt3\) (b) \(2\) (c) \(0\) (d) \(1\)

5. \(\sqrt{\cfrac{1+cos⁡ 30°}{1-cos30°}} \) \(= sec60° + tan60°\)

6. \(tan^2 \cfrac{\pi}{4} sin⁡\cfrac{\pi}{3} tan⁡\cfrac{\pi}{6} tan^2⁡ \cfrac{\pi}{3}=1\cfrac{1}{2}\)