2 years ago

I need help! Giving brainiest. Please answer as many questions as you can!!!!

Mathematics

1 answer:

Mars2501 [29]2 years ago

8 0

Answer:

2. 12

3. 1 6/8

4. 8 5/8

5. 4 4/8

6. Eli is incorrect 1 3/8 x 3 is 4 1/8 which is greater than 3 1/8

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Simply (tan^2 x - sec^2 x)(sin^2 x + cos^2 x)

kati45 [8]

we can use pythagorean identieis

remember that $sin^2(x)+cos^2(x)=1$

also remember that $tan(x)=\frac{sin(x)}{cos{x}}$ and $sec(x)=\frac{1}{cos(x)}$

so if we take $sin^2(x)+cos^2(x)=1$ and divide both sides by $cos^2(x)$ we get

$\frac{sin^2(x)}{cos^2(x)}+\frac{cos^2(x)}{cos^2(x)}=\frac{1}{cos^2(x)}$

$(\frac{sin(x)}{cos(x)})^2+1=(\frac{1}{cos(x)})^2$

$tan^2(x)+1=sec^2(x)$

subtracting $1+sec^2(x)$ from both sides

$tan^2(x)-sec^2(x)=-1$

now subsitute into original problem

$\frac{tan^2(x)-sec^2(x)}{sin^2(x)+cos^2(x)}=$

$\frac{-1}{1}=$

$-1$

the answer is -1

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3 years ago

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Svetradugi [14.3K]

Answer:

Commutative Property

Step-by-step explanation:

The commutative property of multiplication states that when two numbers are being multiplied, their order can be changed without affecting the product.

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3 years ago

What has two fewer sides than a heptagon

Citrus2011 [14]

A heptagon has 7 sides, so 7-2=5

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3 years ago

Hi! It would be very helpful if I got an answer & explanation for this problem.. I don't get it.

dlinn [17]

Answer: 8% is correct!

Step-by-step explanation: have a good day!

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3 years ago

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Step-by-step explanation:

-44(4/9)

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