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


1

125

April 1, 2019

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


1

960

April 1, 2019

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


1

855

April 1, 2019

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


1

228

April 1, 2019

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


1

226

April 1, 2019

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


1

505

April 1, 2019

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


1

216

April 1, 2019

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


1

102

April 1, 2019

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


1

418

April 1, 2019

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


1

115

April 1, 2019

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


1

852

April 1, 2019

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


1

368

April 1, 2019

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


1

97

April 1, 2019

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


1

523

April 1, 2019

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


1

363

April 1, 2019

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


1

415

April 1, 2019

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


1

405

April 1, 2019

Choose the correct option. Justify your choice


1

218

April 1, 2019

Evaluate:sin2 63°+sin2 27°


1

290

April 1, 2019

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


1

332

April 1, 2019

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


1

1203

April 1, 2019

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


1

143

April 1, 2019

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


1

151

April 1, 2019

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


1

262

April 1, 2019

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


1

192

April 1, 2019

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


1

225

April 1, 2019

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


1

2584

April 1, 2019

Evaluate: sin18°/cos72°


1

187

April 1, 2019

If tan (A + B) = √3 and tan (A – B)


1

132

April 1, 2019

Choose the correct option and justify your choice:


1

314

April 1, 2019
