All categories

4 years ago

Prove that cos^2A+sin^2A.cos2B=cos^2B+sin^2B.cos2A

Mathematics

1 answer:

stiv31 [10]4 years ago

4 0

Notice that both sides of the equation have a similar form. If we ignore angle functions we end up with,

$A+A\cdot B=B+B\cdot A$

That is true if condition $A=B$ is met.

Otherwise it is false.

Hope this helps.

r3t40

You might be interested in

I will make u a brainllest

Luba_88 [7]

Answer: d) q--->r

Step-by-step explanation:

This is an example of substitution. We know that p=q, and need to make p=r.

Lets assume p=3. Then q must equal 3. Then r must equal three. Thus, q=r.

If x=y and x=z then y=z

7 0

3 years ago

I think of a number multiply it by 3 and add 7. I get the same answer if 1 multiply the number by 4 and subtract 12. find the nu

JulsSmile [24]

Answer:

19 most probably if yes mark me brainliest pls

4 0

3 years ago

A scuba diver returning to the surface swims to move up quickly, then waits a few meters below the surface to avoid pressure iss

Juliette [100K]

Given:

The function f represents the diver's distance from sea level over time, in seconds.

$f(x)=\begin{cases}3x+1 & \text{ if } -9$

To find:

The correct statement for the domain.

Solution:

Domain is the set of input values for which the function is defined.

Here, x values are the input values and they represent time intervals on which the function is defined

Here, the possible intervals for x are $-9$ .

$Domain=(-9,-2]\cup (-2,1]\cup (1,7)$

$Domain=(-9,7)$

Therefore, the domain is the time interval (−9, 7). Hence the correct option is A.

4 0

3 years ago

Help me with this!!!!!

krok68 [10]

Answer:

b = 28

Step-by-step explanation:

b + 28 = 2b

28 = 2b - b

28 = b

b = 28

4 0

3 years ago

Solve- No Spam please!! ⚔️⚔️⚔️

svp [43]

⇒∫x Dx

-2

⇒ (x²/2)4-2

⇒1/2 (x²)4 -2

⇒ 1/2 [4²-(-2)² ]

⇒1/2 [ 4×4 - (-2x-2)]

⇒1/2 [ 16 - 4]

⇒1/2 × 12

⇒6(Ans)

8 0

3 years ago

Prove that cos^2A+sin^2A.cos2B=cos^2B+sin^2B.cos2A​

Prove that cos^2A+sin^2A.cos2B=cos^2B+sin^2B.cos2A