For each triangle, find the missing side length to the nearest tenth. : The hypotenuse is 20 mm long. How long is the side adjacent to a 15 degrees angle.

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asked Jan 23, 2016 29.6k views

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Paul Thomas · Answer 1 · 2016-01-27T03:00:55+0000

We can use trigonometry. The cosine of 15 will be the side adjacent to the 15-degree side (the one we are looking for) divided by 20, the hypotenuse. As cos(15) is about .966, we get 19.32 as the side we are looking for.

For each triangle, find the missing side length to the nearest tenth. : The hypotenuse is 20 mm long. How long is the side adjacent to a 15 degrees angle.

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