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mihalych1998 [28]
3 years ago
15

I need help on my math hw please and thanks!!

Mathematics
1 answer:
jarptica [38.1K]3 years ago
3 0
Attached solutions and work.

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On the unit circle, which of the following angles has the terminal point coordinates (√2/2,-√2/2)
aleksandr82 [10.1K]

Answer:

Option B

Step-by-step explanation:

A unit circle means radius of the circle = 1 unit

Let a terminal point on the circle is (x, y) and angle between the point P and x-axis is θ.

Center of the circle is origin (0, 0).

Therefore, ordered pair representing the terminal point will be (OP×Cosθ, OP×Sinθ) = (\frac{\sqrt{2} }{2},-\frac{\sqrt{2} }{2})

OP.Cosθ = 1×Cosθ = \frac{1}{\sqrt{2}}

Cosθ = \frac{1}{\sqrt{2}}

θ = \frac{\pi }{4}+2\pi n,  \frac{7\pi }{4}+2\pi n where n = integers

Similarly, OP×Sinθ = 1×Sinθ = -\frac{1}{\sqrt{2}}

Sinθ = -\frac{1}{\sqrt{2} }

θ = \frac{5\pi }{4}+2\pi n,  \frac{7\pi }{4}+2\pi n where n = integer

Common value of θ will be, θ = \frac{7\pi }{4}

Option B will be the answer.

5 0
3 years ago
8=4y-8+4 solve the equation
Yuliya22 [10]

Answer:

y=3

Step-by-step explanation:

4y-8+4=8

4y-4=8

4y-4+4=8+4

4y=12

4y/4=12/4

y=3

3 0
3 years ago
Read 2 more answers
A fish is 5 feet below the surface of a lake. If its position can be recorded as -5 feet what would the position of 0 represent
eduard
The surface of the lake.
6
5
4
3
2
1
0   Here is the surface of the lake
-1
-2
-3
-4
-5 Here is the fish  
-6
5 0
3 years ago
Walt is mixing fruit punch for a party. He combines 1 gallon 2 quarts 3 pints of orange juice 1 gallon 3 quarts 7 pints of pinea
Vlad [161]
So he's mixing: 

1 gallon 2 quarts 3 pints of orange juice
1 gallon 3 quarts 7 pints of pineapple juice and
1 gallon 3 <span> quarts 3 pints of ginger ale

that's:

3 gallons 8 quarts and 13 pints.

2 pints make a quart, so 13 pints make 6 quarts and 1 pint, so actually it's:

</span><span>3 gallons 8+6=14 quarts and 1 pint.
4 quarts are a gallon, and 14 quarts are 3 gallons 2 quarts, so the final answer is:

</span>
<span>3+3=6 gallons 2 quarts and 1 pint. </span>

4 0
3 years ago
What does the word "isohyet" mean?
stepan [7]

Answer:

An isohyet is a line on a map which connects points that have the same amounts of precipitation in a given period or for a particular storm.

Step-by-step explanation:

5 0
3 years ago
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