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Soloha48 [4]
3 years ago
9

What is the cosine of angle F A. 4/5B. 3/4C. 5/4D. 3/5​

Mathematics
2 answers:
saveliy_v [14]3 years ago
6 0

Answer: option D

Step-by-step explanation:

Remember the cosine identity:

cos\alpha=\frac{adjacent}{hypotenuse}

Given the right triangle DFE shown in the image, you can identify that the adjacent side and the hypotenuse for the angle F of this triangle are:

adjacent=15\\hypotenuse=25

Now you can substitute values into  cos\alpha=\frac{adjacent}{hypotenuse} and then reduce the fraction.

THerefore you get:cos(F)=\frac{15}{25}\\\\cos(F)=\frac{3}{5}

Anvisha [2.4K]3 years ago
6 0

Answer:

D

Step-by-step explanation:

Cosine is adjacent over hypotenuse.

adjacent to angle F is  15

over the hypotenuse being 25

reduced is 3/5

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Answer:

Part a - 25 pieces

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Step-by-step explanation:

<u>Part a</u>

Think of this in terms of how many "units" can the total paper be cut into. Easiest way to keep track of units is by their area. In other words, take the total area and see how many unit areas fit into it:

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N = (85 x 60) / (20 x 10)

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Therefore the greatest number of pieces the paper can be cut into is 25 units (the 0.5 doesn't count since it's not a full pieces).

<u>Part b</u>

Again, back to units. This time the "total" is 100, and our unit size is 25.5. So:

Number of units = total gifts / gifts per unit

N = 100 / 25.5

N = 3.9

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3 years ago
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storchak [24]

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Step-by-step explanation:

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4 years ago
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