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stepan [7]
4 years ago
14

Estimate sin pi/3 if sin pi/2 = 1 and sin 0 = 0 and sin pi = 0

Mathematics
1 answer:
xxMikexx [17]4 years ago
6 0
Hello :  
sin(<span>π/3) = </span><span>√3 / 2 </span>
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98. What is the sum of the first 27 terms in the arithmetic series 25 +19+13 + ...?​
jeka57 [31]

Answer:

sum of the first 27 terms = -1431

Step-by-step explanation:

<h3>arithmetic series sum of the first n terms formula:</h3>

s_{n}  =  \frac{n}{2}  (2a + (n - 1)d)

n = 27 terms

first term, a = 25

common difference, d = 19 - 25 = -6

substitute the values into the formula

s_{27} =  \frac{27}{2} (2(25) + (27 - 1)( - 6))

s_{27} = 13.5(50 + 26( - 6))

s_{27} = 13.5(50 - 156)

s_{27} = 13.5( - 106)

s_{27}  =  - 1431

4 0
3 years ago
If triangle ABC is congruent to triangle DEF, which statement is not true?
Blizzard [7]
When you name two congruent triangles with the letters of the vertices, you have to keep the order of the corresponding vertices. That means, that when you say triangle ABC is congruent to DEF, the corresponding congruent angles are A = D, B = E, and C = F. regarding the sides, segment AB = segment DE, segment BC = segment EF, and segment CA = segment FD. Then, the answer is that, of the four options,<span> the one that is not true is the option b, because as we already said the corresponding equal angle C is F, not E.</span>
5 0
3 years ago
Why is 6/8 greater than 5/8 but less than 7/8
My name is Ann [436]
Simple!

Since we can observe that they all have the same denominators (bottom part) we can just observe the numerator (top part)

6 is indeed greater than 5, yes? So we can safely say that

6/8 > 5/8

Now the for the second part. 

6 is smaller than 7, yes? So we can make the observation that

6/8 < 7/8

Hope that makes sense! (Be sure to thank me, plz)

P.S. If you want an example of unlike denominators, let me know. <span />
7 0
3 years ago
Find the slope of the line that passes through the two given points (-4,3) and (-8,6)
klemol [59]
The slope of the line that passes throught (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
given

(-4,3) and (-8,6)
slop=(6-3)/(-8-(-4))=(3)/(-8+4)=3/-4=-3/4

slope is -3/4
4 0
4 years ago
Read 2 more answers
Penelope earned $50 in May. She earned $60 in June.
eduard

Answer:

120% increase

Step-by-step explanation:

7 0
4 years ago
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