Answers
Let y = cos⁻¹(x), so that cos(y) = x.
For some angle y between 0 and π, cos(y) takes on some value between -1 and 1.
For the y in this range, we have cos(y) = -1/2 exactly when y = 2π/3.
Then
tan(cos⁻¹(-1/2)) = tan(2π/3) = sin(2π/3)/cos(2π/3) = (√3/2)/(-1/2) = -√3
Related Questions
help!!!
i will give a brainliest!!
Answers
Answer: is 1 and 3
Step-by-step explanation:
6 weeks to 12 days answer?
Answers
20 points answer please
Answers
Answer:
just d
Step-by-step explanation:
Hope this helps!❆
HELP *picture inserted*
Answers
The answer is b……..
what is 90 plus 60 plus 7x-12
Answers
[tex]90+60+ 7x -12 = 7x+138[/tex]
Answer Please will give brainliest.
Answers
Step-by-step explanation:
blue is natural: 1, 4, 0, 2 and root of 25.
green is whole: -9 and -15.
yellow is rational: 2/3
orange is irrational: pi and root of 15.
white is real numbers.
don't know about that purple one.
How to tell if a piecewise function is differentiable.
Answers
Answer:
So what we're going to do is now take the so drdx of negative 3x plus 1 is equal drdx of x squared
Step-by-step explanation:
3. Stacy went to a pet store to buy bridles for her horse farm. She is buying the bridles for 27 horses. Each bridal is $184. How many dollars will all of the bridles cost her?
Answers
Answer:
the answer is $4968
Step-by-step explanation:
$184 x 27= 4968
Answer:
you would do this 27 x 184 = and get the answer which is $4968.
Step-by-step explanation:
hope it helps.
1 point
10. Lisa owns a small business. There was a loss of $14 on Monday and a
profit of $18 on Tuesday. On Wednesday there was a loss of $6 and on
Thursday there was a profit of $7. Find the total profit or loss.*
$15 profit
$45 loss
$5 profit
$10 profit
Answers
Answer:
$5 in profit
Step-by-step explanation:
simple math
Tues: $18
Wens: -$6
Thurs: $7
-14+18=4
4 - 6 = -2
-2 + 7 = 5
$5 profit
triangle interior angles theorem
answer and explain briefly
Answers
Answer:
x=62
Step-by-step explanation:
(x+1)+ x+55=180
-55 -55 (take away the 55)
(x+1)+ x= 125 (take out of parenthesis)
x+1+ x= 125
2x+ 1= 125 (add the two x's together)
-1 -1 (take away the one)
2x= 124 (divide by 2)
2
x=62
solve pls brainliest
Answers
Answer:
1:none
2:c
3:b
4:a
Step-by-step explanation:
Answer:
A=4 B=3 C= 2 and 1 is none
Step-by-step explanation:
Just look at each shape and imagine or draw out how it would look unfolded.
En la figura, BE y AD son segmentos, AB = 4 y AC = 3. Se puede determinar el perímetro del triángulo
CDE si:
Answers
Answer:
AD=7,BE=6,AB=4,AC=3.
pls help i dont get it
Answers
Answer:
Step-by-step explanation: it’s 41%
What are the possible integer values of x when 3 < x < 7.
Answers
Answer:
4,5 and 6
Step-by-step explanation:
If 3<x that means x>3
If x<7 that means 7>x
possible integer values are 4,5 and 6
pls help 3 x 2 + 6 (4+1) = ???
Answers
Answer:
17 IS THE ANSWER......................
Answer:
Your answer should be 36.
please answer this for me!!
Answers
Answer:
x = 40
y = 8
Step-by-step explanation:
3x-9 = 2x+31
3x-2x = 31+9
x = 40
4y+5 = 2y+21
4y-2y = 21-5
2y=16
y=8
The maximum land speed of a cheetah is about 120km/hour.
What is this speed limit, rounded to the nearest whole number, in m/s?
Answers
Answer:
33 m/s
Step-by-step explanation:
120 km/h × (1 h)/(3600 s) × (1000 m)/(1 km) ≈ 33 m/s
_____
Additional comment
In general, units conversion is done by multiplying by a factor whose numerator and denominator have equal values, but different units. The units in that fraction need to be arranged to cancel the units you don't want and leave the units you do want.
$61.60 for parts and labor rate is $30.00 per hour total cost 136.60 how many hours will the job take? Write an equation and explain how you used it to find the number of hours the job will take.
Answers
Answer:
(136.60 - 61.60) / 30 = 2.5 hours
Step-by-step explanation:
First, subtract the cost of parts from the total: 136.60 - 61.60 = 75
Now you have the total labor cost. Divide by the hourly rate: 75 / 30 = 2.5
Is -5/2 greater than 3?
Answers
Answer:
No -5/2 is not greater than three.
Step-by-step explanation:
You could solve this without doing any math. You know that a negative divided by a positive is still a negative and that negative numbers are never greater than positive numbers so therefore you got the answer. No, -5/2 is not greater than positive 3.
Answer:
No
Step-by-step explanation:
[tex]-\frac{5}{2}[/tex] is not greater than 3; it is less than 3. Positives are greater than negatives. To know if an integer is negative, you should see something like this: - in front of the number.
Positive integers don't have a plus sign in front of it because we already assume it is there.
Find the measure of each angle indicated.
Answers
Answer:
alot of 5
Step-by-step explanation:
If x = 3, y=-1 is a solution of the equation 3x - 2y = k, then k is :
(a) 12
(b) 10
(c) 7
(d)11
Answers
Answer:
11
Step-by-step explanation:
So you replace each letter with it's numerical value.
Note that in arithmetics the sign is critical so observe it.
For this equation, if you solve for k by replacing the known variables with their actual value you get this:
3(3)-2(-1)=k
As stated earlier, the signs are important. When you multiply a negative number with another negative number the sign becomes positive (+).
For this case, -2*-1=+2 and 3*3=9
So, k=2+9
k is therefore 11
Graph: y < 1/3x+1/2 can someone graph this on a actual graph for me
Answers
Answer:
here you go
Step-by-step explanation:
i have added y < 1/3x+1/2 --> this shows more of range so i also attached what y = 1/3x+1/2 would look like
next time use this -
search up: desmos graphing calculator
Rearrange v=u+at to make t the subject of formula.
A. t=(u-v)/(a)
B. t=(v-u)/(a)
C. t=(u+v)/(a)
D. t=(v+u)/(a)
Answers
Answer:
t=(v-u)/a
hope it will help you
Round 2,861 to the nearest hundred
Answers
hope this helps
Hey there!
2,891
= 200,000 + 800 + 90 + 01
= two-hundred thousand, eight hundred ninety one
Thousand:
2,000
Hundred:
900
Tens:
90
Ones:
1
Based on that information we can answer your question
SIMPLIFY IT
ANSWER: 2,900
[2,000 + 900 + 0 + 0]
[two thousand + nine hundred]
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)
Evaluate the following formula for
Please help
I will mark as brainliest if its correct :)
NO LINKS YOU WILL BE REPORTED AND BANNED MARK MY WORD
Answers
Answer:
Step-by-step explanation:
Using provided formula and filling in the variables:
z = [tex]\frac{(0.6-0.7)-(0)}{\sqrt{\frac{0.615782*0.384218}{88}+\frac{0.615782*0.384218}{82} }}[/tex]
Filling in in calculator:
z ≈ -1.34
Use the Distributive Property to
simplify the following:
7(y + 3) =
Answers
Answer:
7y+21
Step-by-step explanation: i solve it hope this help.
Answer:
[tex]\bold{7y+21}[/tex]
Step-by-step explanation:
Hi there!
Let's solve this math problem by using the Distributive Property.
All we have to do is "distribute" 7 (multiply it by all the terms inside the parentheses):
[tex]\bold{7(y+3)}[/tex][tex]\bold{7y+21}[/tex]Hope it helps! Enjoy your day!
~ Just a teenage girl willing to help
[tex]\bold{Besties4Ever:-):-)}[/tex]
Help me guys!
Fill in the table using this function rule.
y = -2x+3
Answers
Y=12+3
Y=15
Y=-2(-3)+3
Y=6+3
Y=9
Y=-2(0)+3
Y=0+3
Y=3
Y=-2(3)+3
Y=-6+3
Y=-3
Y=15
Y=9
Y=3
Y=-3
Among all the paintings in an art exhibit, 60% are oil paintings, and the remaining 40% are watercolor paintings. Among the oil paintings, 5% of them are abstract. Among the watercolor paintings, 10% of them are abstract. What percent of the paintings in the art exhibit are abstract? I give thanks!
Answers
Answer:
7%
Step-by-step explanation:
A group spends $277.50 to rent a total of 15 tubes. How many of each type of tube does the group rent?
Answers
The amount spent on each tube is $18.5
The total amount spent to rent 15 tubes by the group is $277.50.
Since they did not specify in the question the types of tubes they rented, we cannot determine each types of tubes that the group rented but we can determine the amount spent on each tube provided that they are all the same types.
∴
if 15 tubes = $277.50
1 tube = $x
By cross multiplying:
[tex]\mathbf {\$(x) = \dfrac{ \$277.50 \times 1 \ tube }{15 \ tube}}[/tex]
[tex]\mathbf {(x) = \$18.5}[/tex]
Therefore, we can conclude that the amount spent on each tube is $18.5
Learn more about arithmetic operations here:
https://brainly.com/question/15385899?referrer=searchResults
a private and a public university are located in the same city. for the private university, 1046 alumni were surveyed and 653 said that they attended at least one class reunion. for the public university, 791 out of 1327 sampled alumni claimed they have attended at least one class reunion. is the difference in the sample proportions statistically significant at the 1% level?
Answers
Using the z-distribution, it is found that since the absolute value of the test statistic is less than the critical value, the difference in the sample proportions is not statistically significant at the 1% level.
At the null hypothesis, we test if the proportions are the same, that is, their subtraction is 0, hence:
[tex]H_0: p_1 - p_2 = 0[/tex]
At the alternative hypothesis, it is tested if they are different, that is, their subtraction is not 0, hence:
[tex]H_1: p_1 - p_2 \neq 0[/tex]
The proportions and their respective standard errors are given by:
[tex]p_1 = \frac{653}{1046} = 0.6343, s_1 = \sqrt{\frac{0.6343(0.3657)}{1046}} = 0.0149[/tex]
[tex]p_2 = \frac{791}{1327} = 0.5961, s_2 = \sqrt{\frac{0.5961(0.4039)}{1327}} = 0.0135[/tex]
For the distribution of the difference, the mean and the standard error are given by:
[tex]\overline{p} = p_1 - p_2 = 0.6343 - 0.5961 = 0.0382[/tex]
[tex]s = \sqrt{s_1^2 + s_2^2} = \sqrt{0.0149^2 + 0.0135^2} = 0.0201[/tex]
The test statistic is:
[tex]z = \frac{\overline{p} - p}{s}[/tex]
In which [tex]p = 0[/tex] is the value tested at the null hypothesis.
Hence:
[tex]z = \frac{\overline{p} - p}{s}[/tex]
[tex]z = \frac{0.0382 - 0}{0.0201}[/tex]
[tex]z = 1.9[/tex]
The critical value for a two-tailed test, as we are testing if two values are different, with a significance level of 0.01, is of [tex]|z^{\ast}| = 2.576[/tex]
Since the absolute value of the test statistic is less than the critical value, the difference in the sample proportions is not statistically significant at the 1% level.
A similar problem is given at https://brainly.com/question/25728144
