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3 years ago

Angles C and D are acute angles of a right triangle.

Mathematics

1 answer:

Flauer [41]3 years ago

7 0

Answer:

The answer to your question is cos C = $\frac{5}{7}$

Step-by-step explanation:

Data

sin D = $\frac{5}{7}$

Formula

sine Ф = $\frac{opposite side}{hypotenuse}$

- If sin D = $\frac{5}{7}$

the opposite side = 5

the hypotenuse = 7

- We can find the adjacent side of angle D using the pytagorean theorem

7² = a² + 5²

a² =49 - 25

a² = 24

a = $\sqrt{24}$

- To find the cosine of angle C

Cos C = $\frac{adjacent side}{hypotenuse}$

Cos C = $\frac{5}{7}$

 sin D = cos C

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3 years ago

Please Help I don’t get it at all N/2+5=3

eduard

N/2+5=3

move +5 to the other side

sign changes from +5 to -5

N/2+5-5= 3-5

N/2= -2

Mutiply both sides by 2/1

N/2*2/1 - Cross out 2 and 2 , divide by 2 then becomes N

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