Ask question

Ask question

All categories

3 years ago

12

Which of the following is not equal to cos⁡(520°)?

2 answers:

Gnoma [55]3 years ago

8 0

The cosine repeats itself every 360 degrees, and it mirrors at 0 and 180 degrees. It inverts around 90 and 270.
So without using a calculator, you can tell that:

cos(520)=cos(520-360)=cos(160)
cos(160) = cos(180-20) = cos(180+20) = cos(200)
cos(160) is NOT equal to cos(20), it would be -cos(20).
cos(160) = -cos(20) = -cos(-20)

So C is the only one unequal.

Bas_tet [7]3 years ago

8 0

Answer:

c is not equal to cos(520)

Step-by-step explanation:

You might be interested in

Pachacha [2.7K]

Answer:

New area: 12ft^2

Step-by-step explanation:

1/3 of 9 is 3

1/3 of 12 is 4

Area = l x w

so 3 x 4 = 12

4 0

3 years ago

SA = 2tr2 + 2trh

julsineya [31]

Given:

Radius of the cylinder = 5 in

Height of the cylinder = 30 in.

To find:

The surface area of the cylinder.

Solution:

The surface area of the cylinder is:

$SA=2\pi r^2+2\pi rh$

Where, r is the radius and h is the height of the cylinder.

Putting $r=5,h=30,\pi=3.14$ in the above formula, we get

$SA=2(3.14)(5)^2+2(3.14)(5)(30)$

$SA=2(3.14)(25)+942$

$SA=157+942$

$SA=1099
$

Therefore, the surface area of the cylinder is 1099 square inches.

6 0

3 years ago

I can’t do this rn does someone know what to do??

uranmaximum [27]

Answer:

see image

Step-by-step explanation:

See image. It all on the paper in the picture. Hope this helps! Please mark Brainliest if possible! tysm!

4 0

2 years ago

David is building wooden picture frames. Each frame requires 3/4 feet of wood. If David started with 12 feet of wood and now has

statuscvo [17]

Answer:

0.75

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Help me I need this answer really fast

Juli2301 [7.4K]

Answer is D or the last choice

6 0

3 years ago

Read 2 more answers