Q1 of 68 Page 9

In ΔABC, ∠ A = 90°, AB = 12 cm and cm, then find ∠B.

Let us draw a diagram according to the question specification so that it gives us a better understanding of the problem.



We know that



According to the question, it is asked that we find the angle of B.


So, from the diagram, we can see that,







B = 30˚


More from this chapter

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2

A vertical pole is high and the length of its shadow is 21m. Find the angle of elevation of the source of light.

 3

A ladder of length 30 m is placed against a wall such that it just reaches the top of the 15 m high wall. At what angle is the ladder inclined to the ground?

 4

When the ratio of the height of a telephone pole and the length of its shadow is , find the angle of elevation of the sun.

 5

In the figure, ABC is a right triangle in which AB = 8 m, ∠BCA = 30°, then find

(i) the angle of elevation of A at C.


(ii) the angle of depression of C at A.


(iii) BC and AC