3 years ago

Given the right triangle below, what is the value of cos B?

Mathematics

1 answer:

Nikitich [7]3 years ago

8 0

Answer:

D, 5/13

Step-by-step explanation:

The cosine of an angle is the adjacent side over the hypotenuse. In this case, that is 5/13. Hope this helps!

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Tom [10]

Answer:

Part 1) $ED=10\ units$

Part 2) $DB=10\ units$

Part 3) $EB=20\ units$

Step-by-step explanation:

we know that

EB=ED+DB

ED=DB -----> given problem

Substitute the given values and solve for x

$x+4=3x-8$

$3x-x=4+8$

$2x=12$

$x=6$

Find the value of ED

$ED=x+4$

substitute the value of x

$ED=6+4=10\ units$

Find the value of DB

Remember that

ED=DB

therefore

$DB=10\ units$

Find the value of EB

EB=ED+DB

$EB=10+10=20\ units$

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Step-by-step explanation:

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