NEWAll India NCERT Mock Test Series for JEE & NEET is now live!Take Free Test
| Exercise 8.2

Question 2

Choose the correct option and justify your choice :

(i) 2tan301+tan230=\dfrac{2\tan 30^\circ}{1+\tan^2 30^\circ} = (A) sin60\sin 60^\circ    (B) cos60\cos 60^\circ    (C) tan60\tan 60^\circ    (D) sin30\sin 30^\circ

(ii) 1tan451+tan45=\dfrac{1-\tan 45^\circ}{1+\tan 45^\circ} = (A) tan90\tan 90^\circ    (B) 11    (C) sin45\sin 45^\circ    (D) 00

(iii) sin2A=2sinA\sin 2A = 2 \sin A is true when A=A = (A) 00^\circ    (B) 3030^\circ    (C) 4545^\circ    (D) 6060^\circ

(iv) 2tan301tan230=\dfrac{2\tan 30^\circ}{1-\tan^2 30^\circ} = (A) cos60\cos 60^\circ    (B) sin60\sin 60^\circ    (C) tan60\tan 60^\circ    (D) sin30\sin 30^\circ

Jump to: