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Stella [2.4K]
4 years ago
12

1+cos(18x)=______ Please answer this

Mathematics
1 answer:
Komok [63]4 years ago
8 0

Answer with Explanation:

Keep in mind these trigonometric Identity:

1. Cos²x - Sin² x= Cos 2 x

2. Cos 2 x = 2 Cos²x-1

3. Cos 2 x = 1 - 2 Sin²x

Now, Coming to the Problem

1 + Cos (18 x)

= 1 + Cos (2 × 9 x)

= 2 Cos ² (9 x)→→→ Cos (2 × 9 x)= 2 Cos² (9 x) - 1

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PLEASE HELP!!!!!!!!!!!!!
goldfiish [28.3K]

Answer:

choice B

Step-by-step explanation:

3 0
3 years ago
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Name the constant in the expression:
Over [174]
The constant is 5 because it is not being effected by the variable it is just a 5
6 0
3 years ago
A train goes twice as fast downhill as it can go uphill, and 2/3 as fast uphill as it can go on level ground. If it goes 120 mph
Pani-rosa [81]

Step-by-step explanation:

Below is the attachment to the solution.

3 0
3 years ago
At noon, ship a is 40 nautical miles due west of ship b. ship a is sailing west at 18 knots and ship b is sailing north at 17 kn
igor_vitrenko [27]

The distance between the ships changing at 92.29 Knots

  • Using the position of ship A as the reference point, at time t measured in hours past noon, ship A is 18 t miles west of this point and ship B is 40 + 17t north of this point.
  • The distance between ships is then

                              d(t) = \sqrt{(18t)^{2} + (40+17t)^{2} } \\

The rate of change of distance is -

                              \frac{dd}{dt} = \frac{36t + 2(40 + 17t)17}{2\sqrt{18t^{2} + (40 + 17t) } }

after putting t = 5 into this rate of change ,

we get, answer = 92.29

To learn more about differentiation from the given link

brainly.com/question/25081524

#SPJ4

4 0
2 years ago
Solve for x.<br> 18x - 12<br> 16x +8<br> x = [?]
rodikova [14]

Answer: x = 10;

Both the angles are congruent, therefore;

8x - 12 = 6x + 8

=> Now subtract 6x from each side of "="

2x - 12 = 8

=> Add 12 to each side;

2x = 20

=> Lastly divide each side by 2;

<u>x = 10</u>

Hope this helps!

7 0
3 years ago
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