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
melomori [17]
3 years ago
15

Solve the equation on the interval 0 less than or equals theta less than 2 pi 0≤θ<2π. 2 cosine theta plus 1 equals 0 2cosθ+1=

0
Mathematics
1 answer:
VARVARA [1.3K]3 years ago
6 0

Answer:

θ = 2π/3 or 5π/3

Step-by-step explanation:

2 cosθ + 1= 0

when  + 1 goes to R H S Side than it becomes negative by transposition   method

2 cos = -1

now by dividing by 2 both sides we get

cosθ  =  -\frac{1}{2}

since cosθ is negative

Cosθ = - cos 60°

it means either cosθ lies in 2nd or third quadrant

θ = π - π/3

or

θ = 2π- π/3

so θ = 2π/3 or 5π/3

You might be interested in
What is the correlation? Plz hurry I need help <br> A.positive <br> B.Negative <br> C.Neither
Anna [14]
The correlation is positive
6 0
3 years ago
A rectangular parking lot is being constructed. The cement paving company needs to know the area of the
Marrrta [24]

Answer:

a=24000/120=200

Step-by-step explanation:

area= a*b

Area=24000

a=120

b=200

5 0
3 years ago
Read 2 more answers
Please answer this in two minutes
alisha [4.7K]

Answer:

WX = 7.9

Step-by-step explanation:

By applying tangent rule (law of tan) in the given right triangle WXY.

tan(W) = \frac{\text{Opposite side}}{\text{Adjacent side}}

tan(27)° = \frac{\text{XY}}{\text{WX}}

0.509525 = \frac{4}{\text{WX}}

WX = \frac{4}{0.509525}

WX = 7.85

WX ≈ 7.9

Therefore, length of side WX is 7.9 units.

3 0
3 years ago
Is what is the slope of -1,5 -5,-5 on a graph
blagie [28]

Answer:

Step-by-step explanation:

(-1,5)....x1 = -1 and y1 = 5

(-5,-5)..x2 = -5 and y2 = -5

slope = (y2 - y1) / (x2 - x1)

slope = (-5 - 5) / (-5 - (-1) = -10 / (-5 + 1) = -10/-4 = 5/2 <===

4 0
3 years ago
What is the value of (5 x 20) + (8 x 10)?
Dima020 [189]

Answer:

180

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • The measure of each interior angle of a regular polygon is 150 how many sides does the polygon have?
    10·1 answer
  • The two cones are congruent
    9·1 answer
  • Hello I need help for this math homework please
    9·1 answer
  • If f(x)=x sqrt -25 and g(x)=x-5, what is the domain of (f/g)(x)?
    13·2 answers
  • Find the measures of the angle QUESTION A.
    11·1 answer
  • The perimeter of a triangle is 141 inches. The lengths of the sides are in the ratio 5:12:13. Calculate the length of each side.
    8·1 answer
  • Giving brainliest *easy*
    8·2 answers
  • Which expression in equivalent to 12(2n+6) ?
    9·1 answer
  • Find the value of the expression.
    12·1 answer
  • A solid toy is in the form of a hemisphere surmounted by a right circular cone. The height of the cone is 4 cm and diameter of t
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!