Question

Q.9 The angle of elevation of a ladder leaning against wall is 60" and the foot of the ladder is 12 m away ​

Answer 1

Answer:

Let AB be the wall and BC be the ladder.

Then, ∠ACB=60∘ and AC=12m

AC /BC= cos60∘  =  1 /2

⇒BC=2×AC

=(2×12)m

=24 m

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Answer 2

Step-by-step explanation:

tan60=x/12

root3=x/12

root3×12=x

taking in the value of root 3 we get

1.732×12=x

20.784cm=x

thus our x that is the height of the ladder is 20.784 cm or 20.78 cm approx.