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
Rzqust [24]
3 years ago
13

Q.23 Prove that: (sin4A - cos4A + 1) = 2sin2A

Mathematics
1 answer:
FrozenT [24]3 years ago
4 0

Answer:

Step-by-step explanation:

I think you have the question incomplete, and that this is the complete question

sin^4a + cos^4a = 1 - 2sin^2a.cos^2a

To do this, we can start my mirroring the equation.

x² + y² = (x + y)² - 2xy,

This helps us break down the power from 4 to 2, so that we have

(sin²a)² + (cos²a)² = (sin²a + cos²a) ² - 2(sin²a) (cos²a)

Recall from identity that

Sin²Φ + cos²Φ = 1, so therefore

(sin²a)² + (cos²a)² = 1² - 2(sin²a) (cos²a)

On expanding the power and the brackets, we find that we have the equation proved.

sin^4a + cos^4a = 1 - 2sin^2a.cos^2a

You might be interested in
2 7/10 as a decimal please again I’m sorry
const2013 [10]

2.7 would be 2 7/10. Correct?

7 0
3 years ago
Read 2 more answers
If Laura walks 3 miles in 80 minutes, then Laura will walk how far in 120 minutes if she walks at the same speed the whole time?
svet-max [94.6K]

Answer: the answer would be 4.5

Step-by-step explanation:

she walks 3 miles every 80 minutes and 80 plus 80 would be 160 but this is 120 so it would be 80 plus 40 so its half of 80 so half of 3 is 1.5 so there, hopes this helps

5 0
3 years ago
Read 2 more answers
Sorry to bother you, but I am STUGGLYINGGG
Y_Kistochka [10]
I think the answer is a
6 0
2 years ago
Read 2 more answers
Jacob paid $987 for a laptop which was 60% off the original price. What was the
Ray Of Light [21]

Answer:

$2467.50

Step-by-step explanation:

987 = ( 1 - 0.6 )x

987 = 0.4x

x = 2467.5

3 0
2 years ago
Look at the set of quadrilaterals in the coordinate plane shown below.
morpeh [17]

The true statement about the set of quadrilaterals in the coordinate plane is B. Because quadrilateral ABCD can be reflected across the x -axis, then rotated 90° counterclockwise about the origin, and then dilated about the origin by a scale factor of 2 to obtain quadrilateral A'B'C'D' , then quadrilateral ABCD is similar to quadrilateral A'B'C'D'.

<h3>What is a quadrilateral?</h3>

A quadrilateral is a polygon having four sides, four angles, and four vertices.

In this case, because quadrilateral ABCD can be reflected across the x -axis, then rotated 90° counterclockwise about the origin, and then dilated about the origin by a scale factor of 2 to obtain quadrilateral A'B'C'D' , then quadrilateral ABCD is similar to quadrilateral A'B'C'D'.

Learn more about quadrilateral on:

brainly.com/question/23935806

#SPJ1

3 0
2 years ago
Other questions:
  • Consider this sphere side the inder
    9·1 answer
  • Factorise and simplify <br><br> 2(3+6)
    6·1 answer
  • Approximately, where do the numbers in the first file go in the second file's number line?
    12·2 answers
  • How to put 1760 into a fraction
    12·2 answers
  • 16 is 80% of what number
    15·2 answers
  • State whether each of the following changes would make a confidence interval wider or narrower.​ (Assume that nothing else​ chan
    8·1 answer
  • Ms. Keller's recipe uses 5 cups of milk to make 12 smoothies, How many cups of milk will be used to make 18 smoothies?
    9·1 answer
  • A system of equations is given below.
    7·1 answer
  • 3.What is the center of the circle?
    12·1 answer
  • Can someone make sure my answers are correct
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!