Year 10 Interactive Maths - Second Edition

Using the Cosine Ratio

Example 5

Find the value of the pronumeral in the following diagram, correct to 2 decimal places.

Solution:

Example 6

Find the length of the hypotenuse in the following diagram, correct to 2 decimal places.

Solution:

Let the length of the hypotenuse be x cm.

So, the length of the hypotenuse is 109.45 cm.