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
zheka24 [161]
3 years ago
8

Use a Double- or Half-Angle Formula to solve the equation in the interval [0, 2π). (Enter your answers as a comma-separated list

. Round your answers to three decimal places where appropriate.)
sin 2θ + sin θ = 0
Mathematics
1 answer:
lara31 [8.8K]3 years ago
8 0
Sin(2θ)+sin(<span>θ)=0
use double angle formula: sin(2</span>θ)=2sin(θ)cos(<span>θ).
=>
2sin(</span>θ)cos(θ)+sin(<span>θ)=0
factor out sin(</span><span>θ)
sin(</span>θ)(2cos(<span>θ)+1)=0
by the zero product property,
sin(</span>θ)=0 ...........(a) or
(2cos(<span>θ)+1)=0.....(b)
Solution to (a): </span>θ=k(π<span>)
solution to (b): </span>θ=(2k+1)(π)+/-(π<span>)/3
for k=integer

For [0,2</span>π<span>), this translates to:
{0, 2</span>π/3,π,4π/3}
You might be interested in
What is the area of the semicircle?
Serggg [28]

Step-by-step explanation:

Area (semi-circle)= \frac{r^2\pi }{2}

A = \frac{(11)^2\pi }{2}

A=\frac{121\pi }{2}

A=\frac{379.94}{2}

A=189.97

The area of the semi-circle is 189.97

6 0
2 years ago
A function y = g(x) is graphed below. What is the solution to the equation g(x) = 3? x = 3 3 &lt; x &lt; 5 3 ≤ x ≤ 4 3 ≤ x &lt;
Fittoniya [83]

The Answer is:  x = 3

8 0
3 years ago
When a circular plate is heated in an oven, its radius increases at the rate of 0.01 cm/min. At what rate is the plate’s area in
m_a_m_a [10]

Answer:

3.14 cm²/min

Step-by-step explanation:

rate of increasing of radius, dr/dt = 0.01 cm/min

r = 50 cm

Area of plate, A = πr²

rate of increase of area

dA/dt = 2πr dr/dt

dA/dt = 2 x 3.14 x 50 x 0.01

dA/dt = 3.14 cm²/min

Thus, the increase of rate of area is 3.14 cm²/min.

7 0
3 years ago
What perfect square that is between 1 and 100 has 27 as one of its factors?
lesya692 [45]
81 because 81 is a perfect square and 27 times 3 =81
7 0
3 years ago
Are these Triangle congruent? How do you know?
tatiyna

Answer:

Yes sas

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • In a class of 120 student 70 student passes in english 80 student pass in hindi and 40 passes in both english and hindi how many
    11·1 answer
  • H(x) = x² + 9<br> a. h(2) =<br> C.<br> If h(x) = 9, x =
    8·1 answer
  • If A=(0,0) and B=(6,3), what is the length of AB ?
    13·2 answers
  • Algebra 1: Which of the following is the correct slope between (1, -1) and (2, 3)?
    15·2 answers
  • How to calculate the mode 5 10 12 4 6 11 13 5
    6·2 answers
  • What is 12×11 pls answer quickly​
    5·1 answer
  • Mathematics is not my subject lol :(
    11·1 answer
  • Is the square root of 15 an irrational number
    7·1 answer
  • 15. Find the length of x. Round to 1 decimal place.
    6·1 answer
  • How many solutions does the equation<br><br> 4x - 2(-x + 6) = 3(2x - 4) have?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!