|
The angles of elevation of the top of a tower from two points at a distance of 4 m
|
|
1
|
2851
|
April 1, 2019
|
|
A straight highway leads to the foot of a tower. A man standing at the
|
|
1
|
4487
|
April 1, 2019
|
|
A 1.2 m tall girl spots a balloon moving with the wind in a horizontal
|
|
1
|
4200
|
April 1, 2019
|
|
As observed from the top of a 75 m high lighthouse from the sea-level,
|
|
1
|
2983
|
April 1, 2019
|
|
From the top of a 7 m high building, the angle of elevation of the top
|
|
1
|
3412
|
April 1, 2019
|
|
A TV tower stands vertically on a bank of a canal. From a point
|
|
1
|
2214
|
April 1, 2019
|
|
Two poles of equal heights are standing opposite each other on either
|
|
1
|
3291
|
April 1, 2019
|
|
The angle of elevation of the top of a building from the foot of a tower
|
|
1
|
2399
|
April 1, 2019
|
|
A statue, 1.6 m tall, stands on the top of a pedestal. From a point
|
|
1
|
3098
|
April 1, 2019
|
|
From a point on the ground, the angles of elevation of the bottom
|
|
1
|
1981
|
April 1, 2019
|
|
A 1.5 m tall boy is standing at some distance from a 30 m tall building
|
|
1
|
4372
|
April 1, 2019
|
|
A kite is flying at a height of 60 m above the ground. The string attached
|
|
1
|
2082
|
April 1, 2019
|
|
The angle of elevation of the top of a tower from a point on the ground,
|
|
1
|
375
|
April 1, 2019
|
|
A contractor plans to install two slides for the children to play in a park
|
|
1
|
1754
|
April 1, 2019
|
|
A tree breaks due to storm and the broken part bends so that the top of the tree
|
|
1
|
3089
|
April 1, 2019
|
|
A circus artist is climbing a 20 m long rope, which is tightly stretched
|
|
1
|
1950
|
April 1, 2019
|
|
Prove the following identities, where the angles involved are acute angles
|
|
1
|
2634
|
April 1, 2019
|
|
Choose the correct option. Justify your choice
|
|
1
|
1576
|
April 1, 2019
|
|
Evaluate:sin2 63°+sin2 27°
|
|
1
|
1589
|
April 1, 2019
|
|
Write all the other trigonometric ratios of ∠A in terms of sec A
|
|
1
|
3853
|
April 1, 2019
|
|
Express the trigonometric ratios sin A, sec A and tan A in terms of cot A
|
|
1
|
5100
|
April 1, 2019
|
|
Express sin 61° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°
|
|
1
|
455
|
April 1, 2019
|
|
If A, B and C are interior angles of a triangle ABC, then show that:
|
|
1
|
1714
|
April 1, 2019
|
|
If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A
|
|
1
|
863
|
April 1, 2019
|
|
If tan A = cot B, prove that A + B = 90°
|
|
1
|
1253
|
April 1, 2019
|
|
If tan 2A = cot (A – 18°), where 2A is an acute angle, find the value of A
|
|
1
|
1368
|
April 1, 2019
|
|
Show that: (i) tan 48° tan 23° tan 42° tan 67° = 1
|
|
1
|
5202
|
April 1, 2019
|
|
Evaluate: sin18°/cos72°
|
|
1
|
1252
|
April 1, 2019
|
|
If tan (A + B) = √3 and tan (A – B)
|
|
1
|
1507
|
April 1, 2019
|
|
Choose the correct option and justify your choice:
|
|
1
|
1712
|
April 1, 2019
|