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topjm [15]
3 years ago
11

Hypotenuse of 15 and opposite of 12For this triangle what is the cos

Mathematics
1 answer:
muminat3 years ago
8 0
<h3>Given</h3>

right triangle with side "a" = 12 and hypotenuse "c" = 15

<h3>Find</h3>

cos(∠A)

<h3>Solution</h3>

The Pythagorean theorem tells you

... b = √(c² - a²) = √(225 - 144) = √81 = 9

The definition of the cosine tells you

... cos(A) = b/c = 9/15

... cos(A) = 3/5 . . . . . . reduce the fraction

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