What is COS240 degrees? How much is cos240 degrees?

cos (240°) equals.

Cosine (cosine function), trigonometric function.

one. In RT ABC (right triangle), c = 90° (as shown in the overview diagram), the cosine of a is the hypotenuse of its adjacent side than the triangle, i.e., cosa=b c, which can also be written as cosa=ac ab. Cosine function:

f(x)=cosx（x∈r）。

Cosine theorem. Also known as the second cosine theorem. One of the important theorems about the relationship between the corners of triangles. The theorem asserts that the square of either side of a triangle is equal to twice the sum of the squares of the other two sides minus the cosine of the two sides at their angles.

Trigonometric functions: Used to calculate the edges of unknown lengths and unknown angles in triangles, and have a wide range of uses in navigation, engineering, and physics. In addition, using trigonometric functions as a template, a similar class of functions can be defined, called hyperbolic functions.

The common hyperbolic function is also known as the hyperbolic sinusoidal function.

hyperbolic cosine functions and so on. Trigonometric functions (also known as circular functions) are functions of angles; They are important in studying triangles and modeling periodic phenomena and many other applications.

Trigonometric function is usually defined as the ratio of the two sides of a right triangle containing this angle, and can also be defined equivalently as the length of various line segments on a unit circle. More modern definitions express them as infinite series or specific differential equations.

allows them to be extended to arbitrary positive and negative values, even complex values.

Cannot be evaluated by the calculator, cos240=cos(180+60)=-cos60=

cos240=cos360-120=cos-120=cos120=cos180-60=-cos60=-1 2,cos in mathematics represents the cosine value, which is a kind of trigonometric function.

What is COScos stands for cosine function, which is a type of trigonometric function. The cosine theorem is a mathematical theorem that describes the relationship between the length of the three sides of a triangle and the cosine trillion value of an angle, and is a generalization of the Pythagorean theorem in the general case of triangles, and the Pythagorean theorem is a special case of the cosine theorem.

Common trigonometric values:sin0=sin0°=0

cos0=cos0°=1

tan0=tan0°=0

sin30=，sin30°=1/2

cos30=，cos30°=√3/2

tan30=，tan30°=√3/3

sin60=，sin60°=√3/2

cos60=，cos60°=1/2

tan60=，tan60°=√3

。According to the trigonometric calculation formula, we know that cos240=cos360-120=cos-120=cos120=cos180-60=-cos60=. The formula for calculating the number of triangular Han Min buried grinding numbers in the bridge bucket is:

sin30°=, tan45°=1, liquid trace tan60°=3, etc.

Hello, what you want to ask is how much is cos240 degrees? -1/2。

cos240=cos360-120=cos-120=cos120=cos180-60=-cos60=-1/2。

cos is one of the trigonometric clever functions, which represents the stool base of the cosine function. In a right triangle, cos is equal to the ratio of the adjacent edges of the hypotenuse, i.e., cos = adjacent hypotenuse.

,cos(0°) 1,cos(90°) 0,The tenant cos is the adjacent side than the hypotenuse, draw a triangle with an angle of 24 degrees, that is, use a ruler to measure the adjacent rolling edge and hypotenuse of the 24-degree angle, and then divide the adjacent edge by the hypotenuse to obtain, so cos24 degrees is equal to.

1/2。The formula simplifies the calculation that cos420°=cos(360°+60°)=cos60°=1 2.

1/2。According to the definition of the three-finger angle elimination function, cos( ) is equal to the ratio of adjacent edges to hypotenuse in a right triangle, and when it is 240 degrees, it can be converted to a standard angle of -120 degrees, and cos(-120 degrees) is equal to cos(120 degrees) is equal to 1 2.

equal to - 3 2 or approx.).

According to the Trigonometric Function, 210 degrees are converted into radians, and 210 degrees = 7 6 radians are obtained. Find a reference angle of 210 degrees, i.e. an angle with which it has the same cosine value in the first quadrant. The reference angle is 30 degrees or 6 rads.

According to the cosine value of the particular angle, cos30 degrees = 3 2 is obtained. By celery at 210 degrees in the third quadrant, and the cosine function is negative in the third quadrant, so cos210 degrees = -cos30 degrees = - 3 2.

Trigonometric functions are functions about angles, which can be defined by the ratio of the inner angles of a right triangle to its two sides, or the length of the line segments of the various units of a circle.