The angles of elevation of the top of a tower from two points at a distance of 4 m


2

109

April 1, 2019

A straight highway leads to the foot of a tower. A man standing at the


2

752

April 1, 2019

A 1.2 m tall girl spots a balloon moving with the wind in a horizontal


2

715

April 1, 2019

As observed from the top of a 75 m high lighthouse from the sealevel,


2

166

April 1, 2019

From the top of a 7 m high building, the angle of elevation of the top


2

174

April 1, 2019

A TV tower stands vertically on a bank of a canal. From a point


2

453

April 1, 2019

Two poles of equal heights are standing opposite each other on either


2

152

April 1, 2019

The angle of elevation of the top of a building from the foot of a tower


2

88

April 1, 2019

A statue, 1.6 m tall, stands on the top of a pedestal. From a point


2

297

April 1, 2019

From a point on the ground, the angles of elevation of the bottom


2

88

April 1, 2019

A 1.5 m tall boy is standing at some distance from a 30 m tall building


2

709

April 1, 2019

A kite is flying at a height of 60 m above the ground. The string attached


2

315

April 1, 2019

The angle of elevation of the top of a tower from a point on the ground,


2

77

April 1, 2019

A contractor plans to install two slides for the children to play in a park


2

479

April 1, 2019

A tree breaks due to storm and the broken part bends so that the top of the tree


2

245

April 1, 2019

A circus artist is climbing a 20 m long rope, which is tightly stretched


2

330

April 1, 2019

Prove the following identities, where the angles involved are acute angles


2

332

April 1, 2019

Choose the correct option. Justify your choice


2

182

April 1, 2019

Evaluate:sin2 63°+sin2 27°


2

226

April 1, 2019

Write all the other trigonometric ratios of ∠A in terms of sec A


2

274

April 1, 2019

Express the trigonometric ratios sin A, sec A and tan A in terms of cot A


2

963

April 1, 2019

Express sin 61° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°


2

120

April 1, 2019

If A, B and C are interior angles of a triangle ABC, then show that:


2

133

April 1, 2019

If sec 4A = cosec (A – 20°), where 4A is an acute angle, find the value of A


2

230

April 1, 2019

If tan A = cot B, prove that A + B = 90°


2

161

April 1, 2019

If tan 2A = cot (A – 18°), where 2A is an acute angle, find the value of A


2

188

April 1, 2019

Show that: (i) tan 48° tan 23° tan 42° tan 67° = 1


2

1856

April 1, 2019

Evaluate: sin18°/cos72°


2

144

April 1, 2019

If tan (A + B) = √3 and tan (A – B)


2

114

April 1, 2019

Choose the correct option and justify your choice:


2

245

April 1, 2019
