Question

From a 30 metre high bridge the angle of depression of a boat is 60degree find the horizontal distance of the boat from the bridge

Answer 1

ANSWER

AB=BC=25m

∠B=90

o

∠BAC=θ

Now, in △ABC

∠BAC=∠DCA (alternate angle)

⇒tanθ=

BC

AB

⇒tanθ=1

θ=45

o

(∵tan45

0

=1)

solution