Trigonometry

sin(90 deg) = 0.9848, approx.

In trigonometry, theta is a symbol commonly used to represent an unknown angle in the same way you might use x to label an unknown side or an unknown number in general. Theta looks like this: θ

0.625

The abscissa is the X coordinate of a point, so a point on the Y axis has an abscissa of zero.

hipparchus

Geometry is the study of all shapes. This includes dodecagons. Trigonometry developed much later than geometry for applying the study of triangles to practical application.

The answer depends on the value of m.

The expression is a multiple of a difference of two cubes and so can be factorised quite easily but the question is not about factorising.

It is the theory of establishing three dimonsional positions of an area/field/ with respect to a known direction and known level. It is a very good application of trignometry.

Yes.

Sin = 1 / cos. And cos = 1 / -sin

An equilateral triangle.

It is more than likely that the 4x and 2x do not refer to quadruple and double angles but to the powers of tan. However, given the limitations of the browser it is impossible to be sure.

The answer will depend on whether the angles are measured in degrees or radians. That information is not provided and so the question cannot be answered.

Circle has a circumference and a diameter, what is meant by length, I wonder

It will be in 3rd Quadrant because cosine and sine both are negative in 3rd Quadrant

im sorry but i THINK you cannot do that. think about it:

75/20 we do 75 first; whats half of 5? you can't do it.. whats half of 7? you cant do it, but if you do it in tenths like whats half of 70. but it will not work.

now 20. whats half of 0.. nothing. whats half of 2? 1. but that wont work.

So my estimate would be around; 15/8.

The same way that it is called nowadays.

11pi/12 = pi - pi/12

cos(11pi/12) = cos(pi - pi/12)

cos(a-b) = cos(a)cos(b)+sin(a)sin(b)

cos(pi -pi/12) = cos(pi)cos(pi/12) + sin(pi)sin(pi/12)

sin(pi)=0

cos(pi)=-1

Therefore, cos(pi -pi/12) = -cos(pi/12)

pi/12=pi/3 -pi/4

cos(pi/12) = cos(pi/3 - pi/4)

= cos(pi/3)cos(pi/4)+sin(pi/3) sin(pi/4)

cos(pi/3)=1/2

sin(pi/3)=sqrt(3)/2

cos(pi/4)= sqrt(2)/2

sin(pi/4) = sqrt(2)/2

cos(pi/3)cos(pi/4)+sin(pi/3) sin(pi/4)

= (1/2)(sqrt(2)/2 ) + (sqrt(3)/2)( sqrt(2)/2)

= sqrt(2)/4 + sqrt(6) /4

= [sqrt(2)+sqrt(6)] /4

Therefore, cos(pi/12) = (sqrt(2)+sqrt(6))/4

-cos(pi/12) = -(sqrt(2)+sqrt(6))/4

cos(11pi/12) = -(sqrt(2)+sqrt(6))/4

The circumference of a circle with radius 1000 is 2000 pi, or about 6283.19. A segment of that circumference that is 4.5 degrees is 4.5 / 360 times 6283.19, or about 78.54.

360 degrees

tan(24) = 0.4452

Without knowing anything else, since the question is quite lacking in detail, the range of x is [-infinity, +infinity].

secant of (A) = cosecant of (90- A)

'A' here is 80 degrees.