Q12 of 120 Page 99

Prove that =

L.H.S:








Rationalizing it,









: R.H.S


Hence, proved.


More from this chapter

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11

If a sin θ +b cos θ =c, then prove that, a cos θ -b sin θ =

 12

Prove that =

13

The angle of elevation of the top of a tower 30 m high from the foot of another tower in the same plane is 600 and the angle of elevation of the top of the second from the foot of the first tower is 300. Find the top of distance between the two towers and also the height of the tower.

 13

The angle of elevation of the top of a tower 30 m high from the foot of another tower in the same plane is 600 and the angle of elevation of the top of the second from the foot of the first tower is 300. Find the top of distance between the two towers and also the height of the tower.