Q.

Angle of elevation and angle of depression are always angles which are:

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a

None 

b

Acute

c

Right

d

Obtuse

answer is A.

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Detailed Solution

We have to find the kind of angles in angle of elevation and angle of depression.
We know, angles less than 90 °   are called acute angles.
Since, angle of elevation and angle of depression are always less than 90 °  . So these are acute angles.
Angle of elevation and angle of depression are always acute angles.
Therefore, option 1 is correct.
 
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