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
yuradex [85]
3 years ago
8

Prove that this question:.​

Mathematics
1 answer:
Vikki [24]3 years ago
8 0

This follows directly from the double angle identity for cosine and the Pythagorean identity:

\cos2\theta=\cos^2\theta-\sin^2\theta=\begin{cases}2\cos^2\theta-1\\1-2\sin^2\theta\end{cases}

So we have

\dfrac{1-2\sin^2\theta}{2\cos^2\theta-1}=\dfrac{\cos2\theta}{\cos2\theta}=1

You might be interested in
State that the triangles in each pair of similar. If so, complete the similarity statement, and find the scale factor for each o
ser-zykov [4K]

9514 1404 393

Answer:

  ΔLMN ~ ΔLFG; scale factor 7/3

Step-by-step explanation:

The ratios of side lengths, shortest to longest are ...

  FG : GL : LF = 24 : 36 : 42 = 4 : 6 : 7 (reduced)

  MN : NL : LM = 56 : 84 : 98 = 4 : 6 : 7 (reduced)

The side ratios are the same, so ΔLMN ~ ΔLFG. The scale factor is ...

  MN/FG = 56/24 = 7/3

7 0
3 years ago
Read 2 more answers
-1/3+(-7/4) in simplist form
Airida [17]

Answer:

your answer will be -\frac{25}{12}

Step-by-step explanation:

hope this helps have a nice day :)

8 0
2 years ago
Read 2 more answers
Vertical angles are supplementary, true or false?
beks73 [17]

Answer:

False

Step-by-step explanation:

Vertical angles are a pair of opposite angles created by intersecting lines. The Vertical Angles Theorem states that if two angles are vertical, then they are congruent.

4 0
3 years ago
Read 2 more answers
Solve the equation. Check your answers.<br>29=7x+5-4x​
Vladimir [108]

Answer:

x = 8

Step-by-step explanation:

29=7x + 5 -4x

add like terms: 29 = 3x +5

get your x variable on one side

24 = 3x

divide by 3

x = 8

check!

29 = 7(8) + 5 -4(8)

29 = 56 + 5 -32

29 = 51 - 32

29 = 29

6 0
3 years ago
What is the area of this question.
frez [133]
The area of a circle is \pi r^2, where r is the radius of the circle. The diameter of a circle is the length of a line that passes through the center of the circle and stops at the perimeter of circle. The radius of a circle is half the diameter. Divide the diameter by 2 to find the radius.
1. 2.8 m / 2 = 1.4 m
2 . \pi (1.2m)^2: Plug in the value we just found for r.
3. \pi 1.44m^2 : Use the order of operations (PEMDAS).
4. \pi * 1.44m^2 = ~4.52 m^2
The area of the circle is equal to 4.52 m^2.
7 0
3 years ago
Other questions:
  • If [infinity] cn8n n = 0 is convergent, can we conclude that each of the following series is convergent? (a) [infinity] cn(−3)n
    11·1 answer
  • I dont understand this can someone explain it
    14·1 answer
  • The product of 51 and a number less than 427 is 185
    7·1 answer
  • 4. One of the offices at the company was being repainted. Riley’s father challenged him to figure out how many quarts of paint w
    9·1 answer
  • If ABC is reflected across the yaxis, what are the coordinates of A?
    7·1 answer
  • What is the value of x in 11x =33
    5·2 answers
  • The placebo effect is an example of a(n) experimenter bias. participant bias. random assignment bias. random selection bias.
    11·1 answer
  • Which shows the correct way to use expanded form to multiply 38,070 × 100?
    14·1 answer
  • Please help, I beg of y'all <br><br>FIND BD -
    12·1 answer
  • State the solution of the system of linear equation using its grap<br> 6.<br> SOLUTION: (<br> -2
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!