125 kg is equivalent to a few parts of a ton

125 kg is equivalent to a few parts of a ton

one hundred and twenty-five-1000ths
The value of sin45 ° cos15 ° - cos45 ° sin15 ° is______ .
Sin45 ° cos15 ° - cos45 ° sin15 ° = sin (45 ° - 15 °) = sin30 ° = 12
How many tons is 80 kg? How many thousands of meters is 125 meters?
80 kg is equal to 2 / 25 ton, 125 m is equal to 1 / 8 km
Two quarters of a ton, one eighth of a kilometer
Vector a (1,2sinx) vector b (root 3cos2x, - cosx), f (x) = vector a * vector b
When x belongs to [- π, 0], find the maximum and minimum value of F (x), and find the corresponding x value
When x belongs to [- π, 0], find the decreasing interval of F (x)
One
F (x) = vector a * vector b
=√3cos2x-2sinxcosx
=√3cos2x-sin2x
=2(√3/2*cos2x-1/2*sin2x)
=2cos(2x+π/6)
∵ x belongs to [- π, 0]
∴2x+π/6∈[-11π/6,π/6]
When 2x + π / 6 = 0, x = - π / 12, f (x) reaches the maximum value of 2
2X + π / 6 = - π, x = - 7 π / 12 is the minimum value of F (x) - 2
Two
From - 11 π / 6 ≤ 2x + π / 6 ≤ - π = = > - π ≤ x ≤ - 7 π / 12
The decreasing interval of F (x) is [- π, - 7 π / 12]
75 seconds is the simplest fraction
75 △ 60 = 75 / 60 = 5 / 4 points
If the image of the function f (x) SiNx / 2 + α cosx / 2 is symmetric with respect to the straight line x = π / 3, then the value of constant α is equal to__ Process and description. Thank you
The image of the function f (x) = SiNx / 2 + α cosx / 2 is symmetric with respect to the line x = π / 3
The values of functions corresponding to x = 0 and x = 2 π / 3 are equal
That is, f (0) = f (2 π / 3)
∴ sin0+αcos0=sin(π/3)+αcos(π/3)
∴ 0+α=√3/2+α*(1/2)
∴ (1/2)α=√3/2
∴ α=√3
That is, the value of constant α is equal to √ 3
Two tenths of a meter can be regarded as a fraction of a meter, or a fraction of a meter?
Two out of seven meters can be regarded as two out of seven of one meter and one out of seven of two meters
2 / 7 meters can be regarded as 2 / 7 of 1 meter and 1 / 7 of 2 meters
Two in seven, one in seven of two meters
2 / 7 meters can be regarded as 2 / 7 of 1 meter and 1 / 7 of 2 meters
It is known that the minimum positive period of the function f (x) = sin (2wx - π / 6) + 1 is π, and when x = π / 6, the function has the minimum value. The analytic expression of F (x) is obtained
I want the most specific steps,
T = 2W / 2 π = π.. we can get w = 1 f (x) = sin (2x - π / 6) + 1
5 of a [A is a natural number] what is the unit of fraction? When a is ＜ >, the fraction is meaningless?
What's more: < when a is the number, the score is the maximum; when a is the number, the score is the minimum false score; when a is 6, the score is the maximum false score? > ↑
When a is 0, the score is 5 divided by 0, which is meaningless
Because a is a natural number, when a = 1, the fraction has a maximum value of 5
False fraction a, so
Given the function f (x) = sin (2wx - π / 6) - 1 / 2, the minimum positive period of W > 0 is π / 2
Find the value of W and function f (x) of the image of the axis of symmetry equation, urgent
The minimum positive period is 2 π / 2W = π / 2
W=2
f(x)=sin(4πx-π/6)-1/2
The axis of symmetry is 4 π X - π / 6 = k π + π / 2 K ∈ Z
x=kπ/4 + π/6 k∈Z
T=2π/2w=π/2,
w=2.
2wx-π/6=kπ+π/2,
The symmetry axis equation of the image of function f (x) is as follows:
x=kπ/4+π/6,k∈z.