0
Trigonometry
Trigonometry is a field of mathematics. It is the study of triangles. Trigonometry includes planar trigonometry, spherical trigonometry, finding unknown values in triangles, trigonometric functions, and trigonometric function graphs.
3,810 Questions
Change is usually the value of an expression before some operation subtracted from the value after the operation. Occasionally, subtraction may be replaced by division.
How do you put in sine on a calculator?
Most scientific calculators come with a button that says SIN, or they have it under a secondary option usually accessed by pressing the SHIFT or 2ND first then the key sub labeled SIN.
What are extra dimensional beings?
They are living "things" from a space of more dimensions than the 3 dimensions of space and 1 of time that we live in and are aware of.
What are the effects of changing the values of a b and c in the equation y equals af x b c?
Unfortunately, limitations of the browser used by Answers.com means that we cannot see most symbols. It is therefore impossible to give a proper answer to your question. Please resubmit your question spelling out the symbols as "plus", "minus", "times".
What number must you add to complete the square x2 4x 7?
Put in the - or + values for 4x and 7 is the first step in finding the number needed
How do you calculate arc sine?
arc sine is the inverse function of the sine function so if y = sin(x) then x = arcsin(y) where y belongs to [-pi/2, pi/2].
It can be calculated using the Taylor series given in the link below.
The answer depends on the shape whose surface area for which a formula is required.
What are the formulas that include the changes of degree to radian?
To convert from degrees to radians, multiply the number of degrees by (pi / 180). Pi is approximately 3.1416.
sin(3x) = -sqrt(3)/2
so 3x = 240 + k*360 degrees or 300 + k*360 degrees where k is any integer
so that x is 80+120k or 100+120k degrees.
Where does the word railroad come from?
Railroad and railway are both words referring to 'tracked' roads, where a guides (rails) keep the wheeled vehicle on a specific route. The earliest known reference to the word "railroad" is in 1757 and referred to a mine tram on wooden rails and moved either by animals or men. Tracked tramways have been around since antiquity.
The usage for modern railroads hauling freight and people is from the 1820's.
Railroad is a typical American English usage. Railway is more typical British American usage. However there is considerable crossover is usage. For example the "South Pacific Railway Company" (1887) was originally incorporated as the "South Pacific Railroad Company" (1876).
The
How are cranes removed from the roof of tall buildings?
From what I have read: The crane "grows" using a jib, hydraulics, and sections. When the building is completed, the arms are dissassembled on the roof (they may be removed by another crane attached to a truck, or by other equipment on the roof?), and the process is then reversed (each section removed floor by floor by equipment inside the building). The jib is lowered as each section is removed, until there is nothing left, and the jib assembly is removed at ground level. I may need correction on this one though
322
Is a sine function a periodic function?
Yes, the sine function is a periodic function. It has a period of 2 pi radians or 360 degrees.
"Sonya Kovalevsky (1850-1891) was a Russian mathematician. She received her Ph.D from the University of Gottingen for her thesis on partial differential equations. In 1888 she won the Bodin Prize for her memoir on the rotation of a solid body about a fixed point." Excerpted from the Columbia Encyclopedia, 6th. Edition 2007
What is the origin of the word is?
Check any good dictionary (not a small paperback). The word has roots that include Old High German "ist", Old Norse "es", Gothic "ist", Latin "est, and the infinitive esse", Greek "esti", Sanskrit "asti", and Hittite "aszi". A wonderful lineage for such an unassuming [and powerful] word.
How do you calculate the freq of a sine wave?
Suppose a sine wave of the form y = A*sin(k) with
- A = amplitude or maximum value of the function y (namely when k = pi/2 or 90°)
- k = the value on the x-axis of the function
It's typical of a sine wave that it's periodic, which means the function y repeats itself after a certain period. This period is equal to 2*pi or 360°, for example:
for k = pi/2, 5*pi/2, 9*pi/2, ... the value of y will be the same and equal to A (notice that 5*pi/2 = pi/2 + 2*pi and 9*pi/2 = 5*pi/2 + 2*pi)
In physics it's a more common practice to write a sine wave as y = A*sin(omega*t) with omega the angular frequency specified in radians/s (omega refers to the Greek letter) and t the time specified in seconds.
Now, when you want to calculate the frequency f of a sine wave (which is not equal to the angular frequency) or in other words the number of complete cycles that occur per second (specified in cycle/s or s-1 or Hz), you need to know the time T required to complete one full cycle (specified in s/cycle or just s or Hz-1). The frequency f is then equal to 1/T.
Knowing omega you can calculate the frequency in a different and more common way:
since the sine wave is periodic and after a time T one cycle has been completed (thus one period), it follows that omega*T = 2*pi for the function y to have the same value after one period (the function y having the same value is equal to completing one cycle).
Let's rearrange this formula by bringing 2*pi to the left and T to the right, so we get:
omega/(2*pi) = 1/T and since 1/T = f we finally get:
f = omega / (2*pi)What does pricipal mean in math?
calculate the volume of a cylindrical drum 18 cm in diameter 56 in deep
How many different types of triangle are there?
For the "catch all" and most broad type of triangles, there are 3:
Obtuse - 1 angle > 90°
Acute - all angles < 90°
Right - 1 angle exactly 90°
There are more specific categories, such as isosceles triangles, which can be obtuse, right or acute triangles that contain exactly 2 angles of equal degree, and exactly 2 sides of equal lengths.
What are identities trigonometry?
Identities are "equations" that are always true.
For example, the equation sin(x) = cos(x) is true for x = pi/4 + kpi radians where k is any integer [ = 45 + 180k degrees], but for any other value of x the equation is not true.
By contrast, the equation sin2(x) + cos2(x) = 1 is true whatever the value of x. This is an identity.
First obtain the height of the cylinder.
Height = 1077/area of the base
(i.e H = 1077 divided by pie-radius-squared)
Next get how much water does 1cm of height contain.
Take 1077/height.
Therefore, volume of rock = 1cm height's volume x 3
