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lbvjy [14]
3 years ago
6

Solution please! explain clearly​

Mathematics
1 answer:
natali 33 [55]3 years ago
6 0

Answer:

  2

Step-by-step explanation:

For some angle "a", the sine and cosine are related by ...

  sin(a) = cos(π/2 -a)

That is,

  sin(7π/16) = cos(π/16)

  sin(5π/16) = cos(3π/16)

__

Then your sum becomes ...

  sum = sin(π/16)² +sin(3π/16)² +cos(3π/16)² +cos(π/16)²

If we let α = π/16 and β = 3π/16, this can be written as ...

  sum = (sin(α)² +cos(α)²) +(sin(β)² +cos(β)²)

  sum = 1 + 1

  sum = 2

__

The identity sin(α)² +cos(α)² = 1 is sometimes called the Pythagorean identity.

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PSYCHO15rus [73]

Answer:

<h2><em><u>11.2 - B to C</u></em></h2><h2><em><u>12 - B to A</u></em></h2><h2><em><u>8.8 - A to C</u></em></h2>

You have to multiply all the sides by 4.

B to C = 2.8*4

2.8 * 4 = 11.2

B to A = 3*4

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A to C = 2.2*4

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Hope this helped!

3 0
3 years ago
Find the compound Interest for Rs.18,800 ,calculated for 2 years at 13% rate of Interest compounded annually
Vinvika [58]

For compound interest, the formula is given below:

Amount = P(1+\frac{r}{100} )^{n}

Here, P = 18,800

n = 2

r = 13/100

So, Amount = 18,800(1+\frac{13}{100} )^{2}

18,800(1.13)^{2}

= 18,800 × 1.2769

= 24005.72

Compound Interest = Amount - Principal

Compound Interest = 24005.72 - 18800

= 5205.72

Hence, the compound interest for Rs.18,800, calculated for 2 years at 13% rate of interest compounded annually is Rs.5205.72.


4 0
3 years ago
What scale factor was applied to the first rectangle to get the resulting image?
Katena32 [7]

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2 years ago
Rachel enjoys exercising outdoors. Today she walked 5 2/3 miles in 2 2/3 hours. What is Rachel's unit walking rate in miles per
anyanavicka [17]

Answer:

a) 2 1/8 miles per hour

b) 8/17 hours per mile

Step-by-step explanation:

To find the rate in mile per hour, divide miles by hours:

(5 2/3 mi)/(2 2/3 h) = (17/3 mi)/(8/3 h) = 17/8 mi/h = 2 1/8 mi/h

__

To find the rate in hours per mile, invert that number:

1/(17/8 mi/h) = 1/((17 mi)/(8 h)) = (8 h)/(17 mi) = 8/17 h/mi

8 0
3 years ago
11 divided by 30.8 PLEASE I NEED HELP
Harlamova29_29 [7]

Answer:

2.8

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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