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tekilochka [14]
3 years ago
6

What is the exact value of cos 45° ?

Mathematics
2 answers:
kipiarov [429]3 years ago
5 0

Answer:

sqrt{2}/2

Step-by-step explanation:

Georgia [21]3 years ago
3 0
Let the two sides of a right triangle be equal to one, which means that the hypotenuse is √2

Since cosa=adjacent side / hypotenuse

cos45=1/√2

We can rationalize the denominator by multiplying numerator and denominator by √2

√(2)/2

or if you prefer:  √(1/2)
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Rom4ik [11]
We'll do the first one.  I can't read the variable, but it looks like a \theta so that's what I'll use, but it doesn't matter.

First, get the variable by itself:

\theta

You get that before you multiply each side by two.  

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6 0
3 years ago
Free brainless give away
Fed [463]

Answer:

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What is the equation of the line that haas the x-intercept of -5?
Alexus [3.1K]

Answer:

A

Step-by-step explanation:

x=5 is the opposite of -5 so it can be eliminated

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3 years ago
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nadezda [96]

Answer:

1. c

2. b

3. c

4. a

5. b

6. c

7. c

Step-by-step explanation:

1. to check the congrency normally distance formula is used. if the distances/ length are equal we say that sides are congurent.

2. if the slope of two lines are equal then both the lines are parallel. if the product of the slopes of two lines equal to one then lines will be perpendicular.

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3 years ago
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GrogVix [38]

Answer:

3,406.5 litres/hr

Step-by-step explanation:

The liquid is being poured at a rate of 15 gallons per minute.

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