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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

What does sin mean on a calculator?

It is an abbreviation for sine, and that word together with cosine and tangent are used in simple trigonometrical calculations about right-angled triangles. If we take the shortest side of the triangle, together with the hypotenuse (the longest side) these two sides enclose an angle. The sine of that angle tells us how long the third side is compared with the hypotenuse. Draw a triangle ABC with the right angle at A, the shortest side called AB, the hypotenuse called BC, and the remaining side CA, then if we wanted the sine of angle B we would divide the length of CA by the length of CB. If you want to find the Sine of 50 degrees on a calculator you would press buttons in this order: 50, then the sin button, and the answer would be given almost instantly in the calculator's window. That's much quicker than having to calculate for yourself.

How should you draw a circle?

You should draw a circle by first drawing a square. Then turn that square into a house. Then turn the house into a penguin. After all of this get another piece of paper then draw a circle.

Hope I helped :D

Factor x square plus 10 - 24?

xx+10-24=xx-14 --> (x+sqrt(14))(x-sqrt(14))

if xx+10x-24

axx+bx+c

a=1

b=10

c=-24

Multiply a and c:

1*-24=-24

Find multiples of ac that add up to b (d,e [ie de=ac, d+e=b]):

24=2*2*2*3

2*-12, -2*12

3*-8, -3*8

4*-6, -4*6

Rewrite axx+bx+c into axx+dx+ex+c:

xx-2x+12x-24

Factor sets of terms (ie axx+dx, and ex+c):

xx-2x+12x-24

x(x-2)+12(x-2)

Combine like terms:

(x-2)(x+12)

What did the Hindus and the Arabs contribute to the field of trigonometry?

In India, the Hindus made further advances during and after the fifth century. These advances included the construction of some early trigonometric tables and, more important, the invention of a new numbering system that made calculating much simpler. Hindu mathematicians based their version of trigonometry on variants of the sine function. The Hindu system led not only to the sine function, but to the cosine, tangent, and other familiar trigonometric functions we use today.

During their centuries of contact with the Greeks and Hindus, Arabic mathematicians adopted many of their mathematical discoveries. Among prominent Arabic mathematicians who helped translate Hindu mathematical texts or introduced Hindu mathematics to the Arabs were al-Battani (c. 850-929), Abu al-Wafa (940-998), and al-Biruni (973-?). Al-Battani adapted Greek trigonometry and astronomical observations to make them more useful. Al-Biruni was among the first to use the sine function in astronomy and geography, and Abu al-Wafa helped apply spherical trigonometry to astronomy, among other important contributions.

What rights and privileges does Americans have?

we have the rights:

~ job opportunities.

~ freedom of speech, religion, and ownership.

~ education.

Where did the word dollar come from?

The word dollar is derived from German Taler (Thaler) - also a unit of currency. (The word had sometimes been used as a nickname for Spanish pieces of eight, which cirulated in the American colonies).

Work done with an angle of elevation?

the angle of elevation would be the angle between the horizon and the line of sight to whatever object you are measuring to. Lets say for instance that you see a plane, and you determine that it has an angle of elevation of 30 deg. This means that from the horizon, you would need to look up at an angle of 30 degrees to see that plane. below I linked to a diagram which illustrates it quite well. Hope this helped!

What is the scientifec sine for 350000000?

The answer depends on whether 350000000 is in degrees or radians!

How get degree of curvature?

First, divide 180 by pi (3.14159).
Multiply that answer by 100.
You should have approximately 5729.5779514.
This result we will refer to as the Circular Ratio.

Divide the Circular Ratio by the Radius of the curve.
The answer is The Degree Of Curvature for that curve.

Graphically: measure the angle it takes to make a curve 100 feet long.
That angle is The Degree Of Curvature for that curve.

How do you solve 5x-2 3x-6?

5x-2 = 3x-6 5x = 3x - 6 +2 5x = 3x - 4 5x - 3x = -4 2x = -4 x = -2

What does ratio mean in math?

Ratio refers to division, like difference refers to subtraction. So the ratio of 5 to 10 is 5/10 or "5 to 10" or "1 to 2", or sometimes "1 in 2". It means how much by multiplication or division some quantity relates to another.

Sketch a Tangent Functions?

A tangent function is a trigonometric function that describes the ratio of the side opposite a given angle in a right triangle to the side adjacent to that angle. In other words, it describes the slope of a line tangent to a point on a unit circle. The graph of a tangent function is a periodic wave that oscillates between positive and negative values.

To sketch a tangent function, we can start by plotting points on a coordinate plane. The x-axis represents the angle in radians, and the y-axis represents the value of the tangent function. The period of the function is 2π radians, so we can plot points every 2π units on the x-axis.

The graph of the tangent function is asymptotic to the x-axis. It oscillates between positive and negative values, crossing the x-axis at π/2 and 3π/2 radians. The graph reaches its maximum value of 1 at π/4 and 7π/4 radians, and its minimum value of -1 at 3π/4 and 5π/4 radians.

In summary, the graph of the tangent function is a wave that oscillates between positive and negative values, crossing the x-axis at π/2 and 3π/2 radians, with a period of 2π radians.

What quadrant does -135 degrees?

Third quadrant.

From the origin (0,0) and on the positive x-axis. Move an arrow/line clockwise from this axis by 135 degrees. The first 90 degrees are in the bottom right (4th)quandrant. The next 90 degrees(to 180 degrees ; includes 135) will be in the bottom left (3rd) quadrant.

NB From the positive x-axis ,moving anti-clockwise about the origin the angles are positive. When moving clockwise from the same axis the angles are negative.

How do you pronounce nulla poena sine lege?

The pronunciation of "nulla poena sine lege" is as follows:

Noo-la pweh-na see-neh leh-geh

Note: The pronunciation is given in an approximate manner using English phonetics. It may vary slightly depending on regional accents and pronunciation norms.

What is the relationship between trigonometric functions and its inverse?

The trigonometric functions and their inverses are closely related and provide a way to convert between angles and ratios of sides in a right triangle. The inverse trigonometric functions are also known as arc functions or anti-trigonometric functions.

The primary trigonometric functions (sine, cosine, and tangent) represent the ratios of specific sides of a right triangle with respect to one of its acute angles. For example:

The sine (sin) of an angle is the ratio of the length of the side opposite the angle to the length of the hypotenuse.

The cosine (cos) of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse.

The tangent (tan) of an angle is the ratio of the length of the side opposite the angle to the length of the adjacent side.

On the other hand, the inverse trigonometric functions allow us to find the angle given the ratio of sides. They help us determine the angle measure when we know the ratios of the sides of a right triangle. The inverse trigonometric functions are typically denoted with a prefix "arc" or by using the abbreviations "arcsin" (or "asin"), "arccos" (or "acos"), and "arctan" (or "atan").

For example:

The arcsine (arcsin or asin) function gives us the angle whose sine is a given ratio.

The arccosine (arccos or acos) function gives us the angle whose cosine is a given ratio.

The arctangent (arctan or atan) function gives us the angle whose tangent is a given ratio.

The relationship between the trigonometric functions and their inverses can be expressed as follows:

sin(arcsin(x)) = x, for -1 ≤ x ≤ 1

cos(arccos(x)) = x, for -1 ≤ x ≤ 1

tan(arctan(x)) = x, for all real numbers x

In essence, applying the inverse trigonometric function to a ratio yields the angle that corresponds to that ratio, and applying the trigonometric function to the resulting angle gives back the original ratio.

The inverse trigonometric functions are useful in a variety of fields, including geometry, physics, engineering, and calculus, where they allow for the determination of angles based on known ratios or the solution of equations involving trigonometric functions.

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What is the other name of trigonometric function?

Trigonometric functions are often referred to as circular functions. This is because these functions are closely related to the geometry of circles and triangles. The six primary trigonometric functions are sine (sin), cosine (cos), tangent (tan), cosecant (csc), secant (sec), and cotangent (cot). They describe the ratios between the sides of a right triangle in relation to its angles. Trigonometric functions have numerous applications in mathematics, physics, engineering, and various other fields.

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What are the contribution of georg von purbach to trigonometry?

He made his observations with very simple instruments, using an ordinary plumb-line to measure the angles of elevation of the stars. He also introduced a mathematical innovation by using Hindu-Arabic numerals in his sine tables, the first transition from the duodecimal to the decimal system.

What is a true bearing?

A true bearing is a type of bearing that indicates the direction of one point relative to another point on the Earth's surface, measured using true north as a reference point. It is expressed as an angle, measured in degrees, between a fixed reference direction (such as true north) and the direction of the point being observed.

True bearings are important for navigation, surveying, and other applications that require accurate direction-finding. They differ from magnetic bearings, which are measured relative to the Earth's magnetic field, and are subject to variation depending on the location and time. True bearings are more reliable and consistent, as they are based on the Earth's axis of rotation and do not change over time or location.

Is sin 2x equals 2 sin x cos x an identity?

YES!!!!

Sin(2x) = Sin(x+x')

Sin(x+x') = SinxCosx' + CosxSinx'

I have put a 'dash' on an 'x' only to show its position in the identity. Both x & x' carry the same value.

Hence

SinxCosx' + CosxSinx' =

Sinx Cos x + Sinx'Cosx =>

2SinxCosx

What is y equals m x plus b?

Y=mx+b is the equation of a straight line graph in mathematics. Answer Y = mX + b This is the general form of an Equation for a Straight Line when plotted on a coordinates of X versus Y. where. m = slope of the line b = intercept point of the Y-Axis (or the value of Y when X=0)

What 3D shapes have triangular faces?

In geometry, a deltahedron (plural deltahedra) is a polyhedron whose faces are all equilateral triangles. The name is taken from the Greek upper case delta (Δ), which has the shape of an equilateral triangle.