What is DWT?

What is DWT?

DWT is the abbreviation of dead weight tonnage, which means "deadweight ton"
The calculation method is: MDT minus LDT;
Some people may mistakenly think that DWT is the weight of the cargo that the ship can carry. In fact, DWT "DWT" is very different from the actual carrying capacity of the ship, because DWT also includes the weight of the oil (fuel oil, lubricating oil) and water (drinking and domestic water), crew and articles carried by the ship
For example, for a bulk carrier with a DWT of 7000 tons, the carrying tonnage is only about 6000-6500; if it is a refrigerator ship or fishing ship, the actual carrying tonnage is much smaller. For engineering ships and special ships, the carrying tonnage is almost or slightly smaller
Generally speaking, ships of XXX tons refer to DWT, not DWT

What does DWT of port mean

The full name is dead weight tonnage, which is deadweight ton. It generally refers to the total deadweight ton of the ship, sometimes written as DW. The total deadweight ton is equal to the difference between the displacement of the ship at a certain loading draught minus the displacement of the empty ship, that is, the maximum allowable loading capacity of the ship when using a certain loading line, and this capacity is the weight of all things loaded on the ship, Net deadweight tonnage refers to the maximum weight of cargo that can be loaded in a specific voyage, which is equal to the total deadweight - voyage reserve - ship constant

The relationship between sin a + cos a.sin a-cos a.sin a × cos a?

[(sin a+cos a)^2-（sin a-cos a）^2]/4=sin a×cos a

Sin α = cos β find the relationship between α and β

According to the induction formula: sin (π / 2 + β) = cos β, sin (π / 2 - β) = cos β
So sin α = cos β
Then: α = π / 2 + β + 2K π or α = π / 2 - β + 2K π
That is: α ± β = π / 2 + 2K π

If cos α = cos β, what is the relationship between angle α and angle β? If sin α = sin β, what is the relationship between angle α and angle β
If Tan α = Tan β, what is the relationship between angle α and angle β

If cos α = cos β, then α = 2K π soil β, K ∈ Z;
If sin α = sin β, then α = k π + (- 1) ^ k * β;
If Tan α = Tan β, then α = k π + β

-The relationship between sin (α - 75) and COS (α - 75)

This is a trigonometric function of the same angle
The relation is as follows:
［-sin(α-75°］^2+［cos(α-75°)］=1.

The relationship between sin α ± cos α and sin α cos α
What's the relationship? I'm distracted in class

(sinα±cosα)^2 = sin^2α + cos^2α ± 2sinαcosα = 1 ± 2sinαcosα
∴sinα±cosα = ±√(1 ± 2sinαcosα)

If α + β = 5 π, the relationship between sin α and cos α is linear

Is it sin α and cos β?

What is the relationship between sin and cos of the same angle? Are they equal?

sina=cos(90°-a)
sina/cosa=tana
(sina)^2+(cosa)^2=1
If you are satisfied with my answer, please accept it as a satisfactory answer. If you have any questions, you can continue to ask until you understand it!

The set of angles α satisfying sin α = - 1 and COS = 0 is

The set of angles α satisfying sin α = - 1 and COS = 0 is {α | α = 2K π - π / 2, K ∈ Z}
Methods: the image of sine function and cosine function can be used directly or the definition of trigonometric function can be used