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Klio2033 [76]
3 years ago
15

If sin A/2 = 1/2(p+1/p) show that cos A=-1/2(p^2+1/p^2)

Mathematics
1 answer:
faust18 [17]3 years ago
6 0

Step-by-step explanation:

p-p /pq+1

sin

−1

(

1+p

2

2p

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Two friends go out to eat and order the same meal. They pay a 6% sales tax and a 20% tip on their meals. The total bill, includi
vova2212 [387]

Sales tax and tip will increase the price of an item.

The cost of each meal is: $10.89

Let the cost of both meals be x.

A 20% tip means that, the current price is:

Price = x \times (1 + 20\%)

A 6% sales tax on the meal means that, the current price is:

Price = x \times (1 + 20\%) \times (1 + 6\%)

So, we have:

Price = x \times (1 + 0.20) \times (1 + 0.06)

Price = x \times (1.20) \times (1.06)

Price = x \times 1.272

The amount paid is $27.72

So, the equation becomes

27.72= x \times 1.272

Make x the subject

x = \frac{27.72}{1.272}

x = 21.78

So, the cost of each meal is:

Each= \frac{21.78}{2}

Each= 10.89

Hence, the cost of each meal is: $10.89

Read more about sales tax at:

brainly.com/question/19715580

3 0
3 years ago
Given the radian measure of angle KJH is 11π/8 find the measure in degrees. NO LINKS
murzikaleks [220]

9514 1404 393

Answer:

  maybe B . . . it is the closest

Step-by-step explanation:

There are 180/π degrees in a radian.

__

  11π/8 radians = (11π/8)(180°/π) = (11/8)(180°) = 247.5°

7 0
3 years ago
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Find the measure of the missing angle.
Ronch [10]

Answer:

34

Step-by-step explanation:

if you add 90+56 you get 146 and then 180-146=34

7 0
3 years ago
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The first term of an arithmetic sequence is 3. The common difference of the sequence is 1.5 times the first term. Write the next
vova2212 [387]

Answer:

Step-by-step explanation:

Tn = a + (n-1)d

a = 3 and d = 1.5×3 = 4.5

T2 = a + d = 3 + 4.5 = 7.5

T3 = a + 2d = 3 + 2(4.5) = 12

T4 = a + 3d = 3 + 3(4.5) = 16.5

3 0
3 years ago
20 POINTS !!!!! WILL MARK BRAINLIEST !!!!!!PLEASE HELP !!!!!!!! What is the slope-intercept form for each equation in this syste
Effectus [21]
The slope intercept form for the first one is y=-3/4x-7, the second is y=-2/5x+2 and these lines are intersecting.
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4 years ago
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