A straight highway leads to the foot of tower. A man standing at the top of the tower observes a car at an angle of depression of 30°, which approaching the foot of the tower with a uniform speed. Six seconds later; the angle of depression of the car is found to be 60°.
(i) Find the time taken by the car to reach the foot of the tower from point D to B.
(a) 2 sec
(b) 3 sec
(c) 6 sec
(d) 4 sec
(ii) Write the value of 30o.
(a) 2/3
(b) 3/2
(c) 1/3
(d) 3
(iii) Write the value of cosec 60°.
(a) 3
(b) 2/3
(c) 3/2
(d) 1/3
(iv) The line drawn from the eye of an observer to the point in the object viewed by the observer.
(a) Horizontal time
(b) Vertical line
(c) Line of sight
(d) Parallel lines
(v) If the two lines are parallel; then the alternate opposite angles are …..
(a) different
(b) equal
(c) opposite
(d) None of these
(i) 3 sec
(ii) 2/3
(iii) 2/3
(iv) Line of sight
(v) Equal