Question

Find c.
Round to the nearest tenth:
2 cm
15°
105

Answer 1

c = 0.5 cm

Explanation:

Using the Sine rule in the triangle, then

`(c)/(sin15)` =
`(2)/(sin105)` ( cross- multiply )

c × sin105° = 2 × sin15° ( divide both sides by sin105°

c =
`(2sin15)/(sin105)` ≈ 0.5 cm ( to the nearest tenth )

Answer 2

0.5cm

Explanation:

Using the sine rule