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Y_Kistochka [10]
2 years ago
11

Find the exact value of sin165

Mathematics
1 answer:
Katarina [22]2 years ago
5 0
Hope I helped with your problem

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mart [117]
$175 (25*3=25) (25*5=125) (25*7=175)
8 0
3 years ago
What is the measure of ZB of the pentagon?
Anastaziya [24]

Answer:

111°

Step-by-step explanation:

The sun of interior angles in a pentagon is 540° so to find the measure of B we gotta add all given measure up then subtract it from 540

150° + 98° + 89° + 92° + B = 540° ➡ B = 111°

8 0
3 years ago
Round 4,615 to the nearest thousand
satela [25.4K]

Answer: 5,000

Step-by-step explanation: Take the number 4,615 no the rule for rounding any digit is 5 and above give it a shove aka round up 4 and below let it rest or round down go to the digit before the number you are rounding the 6 now six is above 5 so you will round this up now to round it up it will be ten so leave the 0 and carry the 1 over to the 4 add it and you will get your answer and lastly all digits to the right of the place you are rounding make them 0s.

6 0
2 years ago
Read 2 more answers
Can someone help me this?:(
Fofino [41]

Answer:

1. 1, 2, 3, 4

2. A

3. empty set

4. I

5. A

6. O

7. I

8 E and O

9. A

10. I

11. U

12. U

4 0
2 years ago
How do you solve this problem?
jekas [21]
Very nice problem. You should look up the history of this question. It has a very long one having to do with mirrors made between 50 BC and 50 AD.

Step One
Find AB, BC, AC
Before beginning this problem, I'm going to arbitrarily name 
c = AB
a = BC
b = AC It just makes the calculations easier.

AB = radius of the large circle - radius of the medium circle = 20.62 - 8.04 = 12.58
BC = Radii of the two smaller circles added together = 8.04 + 7.35 = 15.39
AC = Radius of the large circle - Radius of the small circle = 20.62 - 7.35 = 13.27

So
a = 15.39
b = 13.27
c = 12.58

Step Two
Find Angle A or <BAC
a^2 = b^2 + c^2 - 2*b*c * Cos(A)
15.39^2 = 12.58^2 + 13.27^2 - 2 * 12.58 * 13.27 * Cos(A)
236.852 = 158.26 + 176.1 -  333.87 * Cos(A)
236.852 = 334.4 - 333.87*Cos(A)
-97.55 = - 333.87 *  Cos(A) 
-97.55 / -333.87 = Cos(A)
0.2922 = cos(A)
A = cos-1(0.2922)
A = 73.01 degrees

Step Three
Just to see if you understand what was done, I'll give you the givens for finding c, and the answer and you can work through the calculations to see if your answer agrees with mine. If it doesn't PM me.
c = 12.58
b = 13.27
a = 15.39

12.58^2 = 13.27^2 + 15.39^2 - 2*13.27*15.39*Cos(C)
C = 51.42

Step Four
Find <B
Every triangle has 180 degrees so
B = 180 - <A - C
B = 180 - 51.42 - 74.01
B = <54.57. 
I have found a moderator who opened the question up so that I can show you why the Cos law is the only way to do this. If the circles are very disproportionate as in this diagram, then no simple assumption can be made. The cos law is all that will work. I would have posted this earlier, but I didn't think anyone would find another method. It's ingenious but not possible for the situation below.

3 0
3 years ago
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