# NCERT Mathematics Class 10 Exemplar Ch 8 Introduction to Trigonometry and Its Applications Part 3

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EXERCISE 8.3

1.

2.

3. If

4.

5.

.

7.

8. Find the angle of elevation of the sun when the shadow of a pole h metres high is h metres long.

9. If , then find the value of

10. A ladder 15 metres long just reaches the top of a vertical wall. If the ladder makes an angle of 60° with the wall, find the height of the wall.

11. Simplify