1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anastaziya [24]
3 years ago
14

Omar wants to determine cos(- (2pi)/3) using the ratios of the 30 degrees - 60 degrees - 90 degrees right triangle . How shoulc

he use this information to determine cos(- (2pi)/7)
Mathematics
1 answer:
Zinaida [17]3 years ago
7 0

Answer:use the reference angle if a 30°and the fact that -2pi/3 is in the 3rd quadrant to determine coz

Step-by-step explanation:

i dont know if this is right just an educational guess, came here looking for the answer but couldn’t find it so

You might be interested in
Solve the given initial-value problem in which the input function g(x) is discontinuous. [Hint: Solve the problem on two interva
faltersainse [42]

Step-by-step explanation:

g(x)=y''+4y\\\\y''+4y=0\\\\m^2+4=0\\m_{1,2} =+2i,-2i

so the complimentary solution is

y_{c} =c_{1} cos2x+c_{2} sin2x

solving for particular solution we get

y_{p} =acosx+bsinx

to find the values of constants a,b we put values in main equation and

-acosx-bsinx+4acosx+4bsinx=sinx\\

as g(x)=sin x

so above equation yields us

a=0,b=1/3

so writing the solution

y=y_{c} +y_{p} \\y=c_{1} cos2x+c_{2} sin2x+(1/3)sinx

using IC's to get the values for c_{1} ,c_{2}

c_{1}=1 ,c_{2} =5/6\\so\\y(x)=cos2x+(5/6)sin2x+(1/3)sinx ,0\leq x\leq \frac{\pi }{2}

solving for upper range

y(x)=\frac{2}{3} cos2x+\frac{5}{6} sin2x,x>\frac{\pi }{2}

7 0
3 years ago
Solve with either Substitution or Eleminiton <br> 2x – 9y = 32 <br> 4x + y = -12
Shtirlitz [24]
4x-18y=64
4x+y=-12
-19y=76
y=-4

4x+(-4)=-12
4x=-8
x=-2
3 0
3 years ago
Read 2 more answers
Change the fraction w-3 w+ 5 w^2 + w - 20
Alona [7]
W - 3w + 25w + w - 20
27w - 3w - 20
24w - 20

7 0
3 years ago
what is the volume of a cylinder with the radius of 5 centimeters and height 2.5 centimeters use 3.14
Rzqust [24]
The answer is v = 196.25
6 0
3 years ago
If the shortest leg of a right triangle is 13, what are the other two side lengths that form a
katrin [286]

Answer:

by pythqgoras theorem

Step-by-step explanation:

b=12

c=5

3 0
3 years ago
Other questions:
  • Tomas grandfather is 100 years old.tomas grandfather is 10 times as old as tomas .how los is tomas?
    8·1 answer
  • Examine the steps shown for testing whether or not x=1 is a zero for the function f(x)=x^3-3x+2. Identify the first line in whic
    9·1 answer
  • The water level at a pier is modeled by the function y= 2.5 cos(2pi/12.5) +12, where y represents the water level measured in me
    14·1 answer
  • 1.according to the business entity assumption persoanl assets are treated as business assets.
    5·1 answer
  • Mathematical sentences can be combined with or or and to make compound sentences.<br> True<br> False
    5·2 answers
  • Write an equation that represents the line passing through the point -3, -1 with a slope of 4
    10·1 answer
  • True or False:
    11·2 answers
  • ASAP PLS ANSWER HELP
    5·2 answers
  • Find the volume of this prism​
    14·1 answer
  • Please i need help catching up, what is this? im giving out brainliest
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!