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frosja888 [35]
3 years ago
13

Show that cos^2 330degrees=1

Mathematics
1 answer:
Sholpan [36]3 years ago
4 0
Actually it's not 1 

330 in 4th quadratic is just 30 in 1st and cos is +ve

so you have

sqrt(3)/2 ^2 = 3/4 = 0.75 
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Find the lateral surface area of this
Ksenya-84 [330]

Answer:

A=157.07\ cm^2

Step-by-step explanation:

Given that,

The radius of a cylinder, r = 5 cm

Height of the cylinder, h = 5 cm

We need to find the lateral surface area of the  cylinder. The formula for the lateral surface area of the cylinder is given by :

A=2\pi r h

Put all the values,

A=2\pi\times 5\times 5\\\\=157.07\ cm^2

So, the lateral surface area of the cylinder is 157.07\ cm^2.

7 0
3 years ago
Are triangles PRU and STQ congruent? Question 2 options:
denis23 [38]

PRU and STQ are not congruent because they aren’t the same size.

No, because they aren’t the same size.

<u>Step-by-step explanation:</u>

Both PRU and STQ triangles aren't in the same size, So it is not congruent. Triangles are congruent if two pairs of corresponding angles and a couple of inverse sides are equivalent in the two triangles.

If there are two sets of corresponding angles and a couple of comparing inverse sides that are not equal in measure, at that point the triangles are not congruent.

3 0
3 years ago
Determine the value of x in the diagram where lines a and b are parallel
Yakvenalex [24]
If lines a and b are parallel, the two angles given would be the same.
2x - 5 = x + 20
x = 25
6 0
3 years ago
A shop is selling notebooks for £1.50 each.
Tema [17]

Answer:

18 . 75

Step-by-step explanation:

1.50's half is 0.75 , Then multiply £1.50 × £25

8 0
2 years ago
Read 2 more answers
Can someone else me with the answer I think that it’s 93 degrees
inna [77]
Thank you for coming to Brainly with your questions!

I believe the answer is: 

93 degrees. You were correct. The interior angles all add up to 360, so you subtract each given angle to find the missing angle.

I hope this helps you! Please mark Brainliest! Let me know if I can help you with any further questions!

-Belle
7 0
4 years ago
Read 2 more answers
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