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QveST [7]
3 years ago
14

What is the cosine ratio for angle F?

Mathematics
2 answers:
Elan Coil [88]3 years ago
8 0

ANSWER

\cos( \angle \: F)  =  \frac{5}{13}

EXPLANATION

The side length adjacent to <F is 5 units.

The length of the hypotenuse is 13 units.

The cosine ratio is

\cos( \angle \: F)  =  \frac{adjacent}{hypotenuse}

This implies that:

\cos( \angle \: F)  =  \frac{5}{13}

The fourth choice is correct.

AnnZ [28]3 years ago
5 0

hope this answer your question :)

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Answer: Choice D

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In other words,

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or

b > 3\frac{2}{15}\\\\

========================================================

Explanation:

Let's convert the mixed number 2 & 3/5 into an improper fraction.

We'll use the rule

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---------------------

Let's multiply both sides by 15 to clear out the fractions

\frac{13}{5} < b - \frac{8}{15}\\\\15*\frac{13}{5} < 15*\left(b - \frac{8}{15}\right)\\\\39 < 15b-8\\\\

---------------------

Now isolate the variable b

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Side note: Another way to go from 47/15 to 3 & 2/15 is to notice how

47/15 = 3 remainder 2

The 3 is the whole part while 2 helps form the fractional part. The denominator stays at 15 the whole time.

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