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
3241004551 [841]
3 years ago
13

Hi can anyone help me with this ..​

Mathematics
1 answer:
aleksley [76]3 years ago
4 0

Answer:

n = π/6, π/4, 3π/4, 5π/6

Step-by-step explanation:

sin(3n) − sin n = cos(2n)

Use double and triple angle formulas:

(3 sin n − 4 sin³ n) − sin n = 1 − 2 sin² n

2 sin n − 4 sin³ n = 1 − 2 sin² n

4 sin³ n − 2 sin² n − 2 sin n + 1 = 0

Factor by grouping:

2 sin² n (2 sin n − 1) − (2 sin n − 1) = 0

(2 sin² n − 1) (2 sin n − 1) = 0

Solve:

2 sin² n − 1 = 0

2 sin² n = 1

sin² n = 1/2

sin n = √2/2

n = π/4, 3π/4

2 sin n − 1 = 0

2 sin n = 1

sin n = 1/2

n = π/6, 5π/6

You might be interested in
I’ll give you fat points
Bogdan [553]

Answer:

  • See below

Step-by-step explanation:

<u>Multiply and simplify:</u>

  • (x - 1)(x + 2)(x + 3) =
  • (x² + 2x - x -2)(x + 3) =
  • (x² + x - 2)(x + 3) =
  • x³ + 3x² + x² + 3x - 2x - 6 =
  • x³ + 4x² + x - 6

<u>From the final polynomial we can see that:</u>

  • a = 1, b = 4, c = 1 and d = - 6

So all the coefficients are positive but the constant d is negative

5 0
3 years ago
Read 2 more answers
Determine the factors of x2 − 8x − 12.
trasher [3.6K]
C. Prime
Pretty sure its C because none of the other options factor to x^2-8x-12
8 0
3 years ago
Read 2 more answers
i suck at geometry but if you can explain on how j can find radius without having a picture pulled up that would be great!
Galina-37 [17]
I believe it equals 360
4 0
3 years ago
Suppose y varies inversely with x and y=20 when x=5. Write an equation for the inverse variation.
Viktor [21]
K = 20 • 5 or 20 = k/5
4 0
3 years ago
Solve pls brainliest
viva [34]

Answer:

5.6 ounces OR 5 and 3/5

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Other questions:
  • Help please asap!! will mark correct answer first brainliest! 25 POINTS.. FIRST SOLVE THE QUESTION WITH THE PICTURE THAN THE ONE
    11·1 answer
  • What is the value of m
    11·1 answer
  • John made a rectangle pen for his dog using 28 feet of fencing. If the width of the pen is 2 feet more than one-half the length,
    8·2 answers
  • Answer dis please- Thanks
    14·1 answer
  • I need the answer to this equation-20 + 11v = 27
    12·1 answer
  • Simplified -2×y+3x-2×y+3×
    13·1 answer
  • A hiker is making his way up a mountain. After resting for a night, he travels with a group toward the top of the mountain
    7·1 answer
  • Inverse equation t=120r/r+120 R=???
    9·1 answer
  • What is the Vertex of 12 and 1
    5·1 answer
  • 11. Write the equation of a line passing through the two points. First find the slope and the y-
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!