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miv72 [106K]
2 years ago
9

What is the rectangular cross hatch chart used for eye test called

Mathematics
1 answer:
Amiraneli [1.4K]2 years ago
7 0
It’s called an Amsler chart hope this helps :)
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How do you solve this problem
Kryger [21]

Answer:

sin(A) = \frac{21}{{29} }

cos(A)=\frac{20}{29 }

tan(A)=\frac{21}{20}

sin(C) = \frac{20}{{29} }

cos(C)=\frac{21}{29 }

tan(C)=\frac{20}{21}

Step-by-step explanation:

So first we need to make sure we know the trig identities to solve this problem.

  • sin(\alpha )=\frac{opposite}{hypotenuse}
  • cos(\alpha )=\frac{adjacent}{hypotenuse}
  • tan(\alpha )=\frac{opposite}{adjacent}

Here we only have two legs of the triangle, so we will need to use the Pythagorean Theorem a² + b² = c² to solve for the missing leg, the hypotenuse in this case.

  • Solving for the hypotenuse, c, we get c = \sqrt{a^{2} +b^{2} }
  • Here a = 20 and b = 21, so plugging in these values to the equation we get: c= \sqrt{(20)^{2}+(21)^{2}  } =\sqrt{400+441} =\sqrt{841}=29

Now we can use the trig identities to figure out the missing values for the problem

  • sin(A) = \frac{21}{{29} }
  • cos(A)=\frac{20}{29 }
  • tan(A)=\frac{21}{20}
  • sin(C) = \frac{20}{{29} }
  • cos(C)=\frac{21}{29 }
  • tan(C)=\frac{20}{21}
4 0
3 years ago
Which of the following represents the graph of f(x) = 3x − 2?
kodGreya [7K]

Answer:

graph of exponential rising up to the right, through the point 0, negative 2

Step-by-step explanation:

I graphed the function on the graph below so you can see that it rises to the right and goes through the point (0,-2).

6 0
3 years ago
Read 2 more answers
What is the range of the following data 7, 5, 9, 10, 1, 2, 2, 8 ​
eduard

Answer:

9

Step-by-step explanation:

The range is the biggest number minus the smallest number

The biggest number in this set is 10

The smallest number is 1

10-1=

9

5 0
3 years ago
Read 2 more answers
Now 11. why is math so hard
nata0808 [166]
A. h = 30Ft * 1.26cm/Ft = 37.8 cm. = Ht. of the model.

37.8cm * 1toothpick/6.3cm = 6 Toothpicks

B. 37.8cm/7.6 = 4.97 hope this helped.
7 0
3 years ago
Liam uses checks and a debit card, but does it not always right all the transactions and his checkbook register. He has lost tra
yarga [219]
The available balance online may not reflect all debit transactions or all checks that were written. Some recent debit transactions and check written may not have been posted to his account yet. The available balance would need to subtract any outstanding debit transactions and any written checks that have not cleared his account. This would yield the correct available balance. 
6 0
3 years ago
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