.......is the angle of elevation of sun ...

.......is the angle of elevation of sun if height of building and its shadow are equal .

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The correct Answer is:

`45^@`

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Angle of elevation is the angle which line of sight makes with the horizontal. Angle of elevation of the top of a tall building is 30^(@) from a place A and becomes 60^(@) from another place B that is 10sqrt()3 m from A towards the building as shown in the figure. Height of the building is close to

A spherical balloon of radius r subtends an angle theta at the eye of an observer. If the angle of elevation of its centre is phi , find the height of the centre of the balloon.

From the top of a 7m high building, the angle of elevation of the top of a cable tower is 60^(@) and the angle of depression of its foot is 45^(@) . Determine the height of the tower.

From a point P on the ground the angle of elevation of the top of a 10m tail building is 30^(@) . A flag is hoisted at the top of the building and the angle of elevation of the top of the flagstaff from P is 45^(@) . Find the length of the flagstaff and the distance of the building from the point P. (You may take sqrt3= 1.732 )

A 1.5m tall boy is standing at some distance from a 30m tall building. The angle of elevation from his eyes to the top of the building increase from 30^(@) " to " 60^(@) as he walks towards the building. Find the distance he walked towards the building.

The angle of elevation of the top of a building from the foot of the tower is 30^(@) and the angle of elevation of the top of the tower from the foot of the building is 60^(@) . If the tower is 50m high, find the height of the building.

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A large balloon has been tied with a rope and it is floating in the air. A person has observed the balloon from the top of a building at angle of elevation of theta_(1) and foot of the rope at an angle of depression of theta_(2 ) . The height of the building is h feet. Draw the diagram for this data.

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KUMAR PRAKASHAN-OBJECTIVE SECTION AS PER NEW PAPER SCHEME -Trigonometric Functions (Fill in the blanks)

cos(pi/3)cos(pi/4) + sin(pi/3) sin(pi/4) .................
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cos((65pi)/4)=.........
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If cot x = - sqrt(5) and x in second quadrant then sin x = ..........
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2sin((5pi)/12) sin(pi/12)=.........
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The value of (1-tan^(2)(15^(@)))/(1+tan^(2)(15^(@))) is ………..
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If A +B + C = pi then secA (cos B cos C - sin B sin C) = .........
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3sin(pi/9) - 4sin^(3)(pi/9) = .......
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One root of the equation 6x - 8x^3=sqrt3 is .........
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(sin(3alpha))/(1+2cos(2alpha))= ..........
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cos(47^@) cos (13^@) - sin (47^@) sin(13^@)= .........
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sin((7pi)/(12))cos(pi/4)-cos((7pi)/(12))sin(pi/4)=...........
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Sum of the measure of an angle of cyclic quadrilateral ABCD is ..........
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Solution set of the equation 3 tan^(2) theta + 4 tan theta + 2 =0 is ....
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For DeltaABC , sinA + sinB + sinC
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In DeltaABC, m angleA = 90 , m angle B = 30 and a = 10^@ then b = .......
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In DeltaABC if m angle C = 90^@ than tanA + tanB = .......
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Solution of the equation 2cos x + 1 = 0 is ...........
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Height of the tower and multy storied building is same of 30 mets . Th...
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.......is the angle of elevation of sun if height of building and its ...
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At .........height one can reach by walking x mets with slope 30^@ and...
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