Question

In the adjoining figure, 10 a) If a = 30°, find the value of b.​

Answer 1

Answer:

Draw a right angled △ABC using given instructions:

Here sin30=

AC

BC

2

1

=

AC

6

Or AC=12 cm

By Pythagoras theorem:

(AB)

2

=(AC)

2

−(BC)

2

=(12)

2

−(6)

2

=108

AB=6

3

cm.