3 years ago

PLZZ HELP. I WILL BE MARKING BRAINLIEST

1 answer:

5 0

Answer:

The question and choices are cut off, could you repost it?

Step-by-step explanation:

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BartSMP [9]

The double angle identities are

$\sin(2x)=2\sin x\cos x$

$\cos(2x)=\cos^2x-\sin^2x$

Then

$2\sin\dfrac\pi6\cos\dfrac\pi6=\sin\left(\dfrac{2\pi}6\right)=\sin\dfrac\pi3$

$\cos^2\dfrac\pi{10}-\sin^2\dfrac\pi{10}=\cos\left(\dfrac{2\pi}{10}\right)=\cos\dfrac\pi5$

The second identity together with the Pythagorean identity, $\sin^2x+\cos^2x=1$ , gives us another equivalent expression:

$\cos^2x-\sin^2x=\cos^2x-(1-\cos^2x)=2\cos^2x-1$

$2\cos^2(0.5)-1=\cos(2\cdot0.5)=\cos1$

4 0

3 years ago

qwelly [4]

Well first subtract 29 - 5 = 24
Therefore, 24 + 5 = 29
And 29 - 24 = 5

3 0

3 years ago

VMariaS [17]

Not enough information provided

6 0

3 years ago

IceJOKER [234]

Negative linear associations

8 0

3 years ago

beks73 [17]

It would be 1649.04 cause 824.52+824.52=

3 0

3 years ago