Question

16. A tower stands ver
7. The angles of elevatio
8. The angle of elevati
find the speed of tr
7. Express sin 81° + tan 81° in terms of trigonometric ratios ol dubles Detv
Fonometric ratios of angles between 0° and 45°
5. If cos 7A - Sin (A - 69), where 7A is an acute angle, tina
II. Answer the following questions
4X2 = 8M |
wwer stands vertically on the ground. From a point which is 15 meter away from the foot of thell
er, the angle of elevation of the top of the tower is 45º. What is the height of the tower?
angles of elevation of the top of a lighthouse from 3 boats A, B and C in a straight line of same
con the light house are a, 2a, 3a respectively. If the distance between the boats A and B is:
ineters. Find the height of light house!
sangle of elevation of a jet plane from a point A on the ground is 60°. After a flight of 15 second
we angle of elevation changes to 309. If the jet plane is flying at a constant height of 1500 V3 mete
me speed of the jet plane. V3 = 1.732
9. Show that cot + tan = sec o cosec 8.
III. Answer the following questions
3 x 4 = 1
straight highway leads to the foot of a tower. Ramaiah standing at the top of the tower obse
acar at an angle of depression 30º. The car is approaching the foot of the tower with a unit
speed. Six seconds later, the angle of depression of the car is found to be 60°. Find the time t
by the car to reach the foot of the tower from this point.
(sino - cos 0+1) - 1
1.Prove that
using the identity sec? 0 = 1 + tan? .
e + cos +1) seco -tan o
K²_1
2.If cosec 0 + cot 0 = k then prove that cos 0 = 7211​

Answer 1

Oh my god such a big question