Question

Use trigonometry to work out the length of y
Give your answer to 1.d.p

Answer 1

3.8 cm

Explanation:

You want the length of the side opposite a 39° angle in a right triangle that has a hypotenuse of 6.1 cm.

Sine

The sine relation is ...

Sin = Opposite/Hypotenuse

sin(39°) = y/(6.1 cm)

y = (6.1 cm)·sin(39°) ≈ 3.8 cm

The length y is about 3.8 cm.

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