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Yanka [14]
2 years ago
6

Sin4u=2sin 2u cos 2u​

Mathematics
1 answer:
yKpoI14uk [10]2 years ago
4 0

Answer:

If you've learnt sin(A+B) = sinAcosB + cosAsinB,

sin(4u)

= sin(2u+2u)

= sin(2u)cos(2u) + cos(2u)sin(2u)

= 2 sin(2u) cos(2u).

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A hot air balloon travels 18miles in 3 hours. At this rate how many miles will the hot air balloon travel in 3/4hour?
Nikolay [14]

Answer:

4,5 miles

Step-by-step explanation:

In 1 hour:    18/3 = 6 miles

6 . 3/4 = 18/4 = 4,5 miles

3 0
3 years ago
Write an equation in slope intercept form for the graph of the line.​
olganol [36]

Answer:

  • y = 2x - 3

Step-by-step explanation:

<u>Slope intercept form:</u>

  • y = mx + b, where m - slope, b - y-intercept

<u>Take two points from the graph:</u>

  • (2, 1) and (3, 3)

<u>Find the slope:</u>

  • m = (3 - 1)/(3 - 1) = 2/1 = 2

<u>Find the y-intercept using point (2, 1) and the equation above:</u>

  • 1 = 2*2 + b
  • b = 1 - 4
  • b = -3

<u>The line is:</u>

  • y = 2x - 3
5 0
2 years ago
Read 2 more answers
B = 10 feet area = 35 feet 2 Find the height of the triangle.
Alexandra [31]

Answer:

Height is 7m

Step-by-step explanation:

B = 10 feet area = 35 feet 2 Find the height of the triangle.

Area of triangle = 1/2 b×h

35 = 1/2(10×h)

35 × 2 = 10h

70 = 10h

h = 70/10

h = 7m

8 0
3 years ago
Find the length of side s to the nearest tenth.
bulgar [2K]

Answer:

  10.3

Step-by-step explanation:

The triangle can be solved from one side and two angles by using the angle sum theorem to find the third angle, then using the Law of Sines to find the remaining sides.

The angle at T is ...

  180° - 119° -36° = 25°

The law of sines tells us side s will be ...

  s/sin(S) = t/sin(T)

  s = sin(119°)×5/sin(25°) . . . . multiply by sin(S)

  s ≈ 10.34763

  s ≈ 10.3

__

<em>Additional comment</em>

  u/sinU = t/sin(T)

  u = sin(36°)×5/sin(25°) ≈ 6.95409

5 0
2 years ago
Is the function even, odd or neither?<br> y=x^2-2x-8
mestny [16]

It is neither.

To be even, f(x) must equal f(-x).

If you substitute -x for x, you'd get

     y = (-x)^2 - 2(-x) -8

     y = x^2 +2x -8

This is not the same as the original, so this is not even.

To be odd, f(x) must equal -f(-x).

If you take the -x substitution from the last step and then multiply it by -1, you'd have:

      y = -1 (x^2 +2x -8)

      y = -x^2 -2x +8

This is not the same as the original either.

The function is neither even nor odd.

5 0
2 years ago
Read 2 more answers
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