Ask question

Ask question

All categories

3 years ago

8

Regular pentagon sides 3.3 cm long

1 answer:

OleMash [197]3 years ago

7 0

3.3 x 5 = 16.5 cm
Happy to Help!

You might be interested in

Can someone answer all 3 thanks.

MA_775_DIABLO [31]

Answer:

All of them are yes because you either subtract or add to put in the form of mx+b

6 0

3 years ago

Arlecino [84]

Answer: B.), D.), and E.)

Step-by-step explanation:

That’s the answer on USAtestprep

3 0

3 years ago

I need the answer tbh

Blababa [14]

I think the answer would be the first one

8 0

3 years ago

Read 2 more answers

Find sin2x, cos2x, and tan2x if sinx=-15/17 and x terminates in quadrant III

vodka [1.7K]

Given:

$\sin x=-\dfrac{15}{17}$

x lies in the III quadrant.

To find:

The values of $\sin 2x, \cos 2x, \tan 2x$ .

Solution:

It is given that x lies in the III quadrant. It means only tan and cot are positive and others are negative.

We know that,

$\sin^2 x+\cos^2 x=1$

$(-\dfrac{15}{17})^2+\cos^2 x=1$

$\cos^2 x=1-\dfrac{225}{289}$

$\cos x=\pm\sqrt{\dfrac{289-225}{289}}$

x lies in the III quadrant. So,

$\cos x=-\sqrt{\dfrac{64}{289}}$

$\cos x=-\dfrac{8}{17}$

Now,

$\sin 2x=2\sin x\cos x$

$\sin 2x=2\times (-\dfrac{15}{17})\times (-\dfrac{8}{17})$

$\sin 2x=-\dfrac{240}{289}$

And,

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

$\cos 2x=1-2(-\dfrac{15}{17})^2$

$\cos 2x=1-2(\dfrac{225}{289})$

$\cos 2x=\dfrac{289-450}{289}$

$\cos 2x=-\dfrac{161}{289}$

We know that,

$\tan 2x=\dfrac{\sin 2x}{\cos 2x}$

$\tan 2x=\dfrac{-\dfrac{240}{289}}{-\dfrac{161}{289}}$

$\tan 2x=\dfrac{240}{161}$

Therefore, the required values are $\sin 2x=-\dfrac{240}{289},\cos 2x=-\dfrac{161}{289},\tan 2x=\dfrac{240}{161}$ .

7 0

3 years ago

I need help fining X. I keep getting a negative number

KIM [24]

Answer:

3

Step-by-step explanation:

3 0

4 years ago

Read 2 more answers