4 years ago

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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goldfiish [28.3K]

Answer:

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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

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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:

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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

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

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after putting t = 5 into this rate of change ,

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2 years ago

Solve for x. 18x - 12 16x +8 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;

x = 10

Hope this helps!

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3 years ago

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