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Andrews [41]
3 years ago
9

In the triangle below, what is the cosine of 45?

Mathematics
2 answers:
Colt1911 [192]3 years ago
7 0
Cosine = adjacent / hypotenuse
cosine = 1 / square root (2)

mote1985 [20]3 years ago
3 0

Answer:

√2

Step-by-step explanation:


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Step-by-step explanation:

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A train leaves at 08.43 and arrives at its destination at 09.23. If the train travelled 73 km, what was it's average speed in km
serg [7]

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Step-by-step explanation:

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5 0
3 years ago
The center of a circle is at (2, −5) and its radius is 12.
stiv31 [10]

Answer:

The equation of the circle is (x - 2)² + (y + 5)² = 144 ⇒ A

Step-by-step explanation:

The form of the equation of the circle is (x - h)² + (y - k)² = r², where

  • r is the radius of the circle
  • h, k are the coordinates of the center of the circle

Let us solve the question

∵ The center of the circle is at (2, -5)

→ From the rule above

∴ h = 2 and k = -5

∵ The radius of the circle is 12

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→ Substitute the values of r, h, and k in the form of the equation above

∵ (x - 2)² + (y - -5)² = (12)²

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∴ The equation of the circle is (x - 2)² + (y + 5)² = 144

7 0
3 years ago
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