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
labwork [276]
3 years ago
12

Please can someone prove this equation

Mathematics
1 answer:
zubka84 [21]3 years ago
6 0

Answer:

see explanation

Step-by-step explanation:

Using the trigonometric identity

sin²x + cos²x = 1

Consider the left side

2cos²A - 1 ← replace 1 by sin²A + cos²A

= 2cos²A - ( sin²A + cos²A)

= 2cos²A - sin²A - cos²A

= cos²A - sin²A = right side ⇒ verified



You might be interested in
Expand this expression: 0.3(9x + 2)<br> Plz help
Vikentia [17]

Step-by-step explanation:

0.3(9x + 2) [Then we multiply to expand]

= 2.7x + 0.6 (Ans)

4 0
3 years ago
Please help!!!!! Fast please
7nadin3 [17]

3/1 cup is the answer!

3 0
3 years ago
Graph the function for the given domain.<br><br> y = x2 − 4 D:{−2, −1, 0, 1, 2}
netineya [11]

Answer:

HOPING THIS HELPED YOU! MARK ME 5\

Step-by-step explanation:

8 0
3 years ago
The length of a rectangle is 4 in longer than its width.
bija089 [108]

The area of the rectangle that has a perimeter of 44 in is calculated as: 117 in².

<h3>What is the Area and Perimeter of a Rectangle?</h3>

Area = length × width

Perimeter = 2(length + width).

Given the following:

  • Width = w in.
  • Length = w + 4 in
  • Perimeter of the rectangle = 44 in.

Therefore:

2(w + 4 + w) = 44

Solve for w

2(2w + 4) = 44

4w + 8 = 44

4w = 44 - 8

4w = 36

w = 9

Width of the rectangle = w = 9 in.

Length = w + 4 = 9 + 4 = 13 in.

Area of the rectangle = 13 × 9 = 117 in².

Learn more about the area of rectangle on:

brainly.com/question/2607596

#SPJ1

5 0
1 year ago
Solve -2(4y + 6) = 52. 5 -5 8 -8<br><br> please help and hurry!!!!!!!!!!!
scoray [572]
-2(4y+6) = 52
-8y -12 = 52
Add 12 on both sides

-8y= 64
Y= -8

Hope this helps!
3 0
3 years ago
Other questions:
  • I’m trying to solve radical equations and am confused <br><br> Radical x - 2 = 2
    5·2 answers
  • Rename numbers using a place value chart
    6·1 answer
  • How would you solve this type of problem?
    15·1 answer
  • Lisa Lilly was the best runner in eighth grade. One day she ran 100m in 40 sec, 200m in 1 and 10 sec, and 200m over low hurdles
    5·2 answers
  • Given f(x) = x + 3x + 2 and g(x) = x + 1, perform the indicated operations. In the
    12·1 answer
  • Please answer this question now in two minutes
    11·1 answer
  • This is two different questions in one. Solve for the given variable. 1. 4y+3=19 2. 12n-3=5
    10·1 answer
  • 13. A map has a scale of 2 cm to 3 km.
    15·2 answers
  • Find what x is 17+7x=x+5
    5·2 answers
  • 2 m − 3 ≤ 5 m + 15 solve this equation
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!