Trigonometry

Tan of pi/2 + k*pi radians, for integer k, is not defined since tan = sin/cos and the cosine of these angles is 0. Since divsiion by 0 is not defined, the tan ratio is not defined.

Yes

There is no celestial object at that distance.

Yes, but it depends on what information you have about the angles.

Zero

It is x+9, provided that x is not -8.

One solution.

(cos x)2 - 2cos x = 3

Factor:

(cos x - 3)(cos x + 1)= 0

cos x = {-1, 3}

Solve:

For cos x = -1, x = 180 deg

No solution for cos x = 3

Northeast.

0.2588

The answer depends on what measurement the conversion concerns. There is no way that you can convert a measurement of mass to degrees, for example.

The difference between +120 and -20 is 140 degrees.

10x + 6 is an expression, not an equation nor an inequality. An expression doesn't have an answer!

================================

10x + 6 is not an equation, and it doesn't ask a question.

It has a numerical value, but we can't know what that is until we know the value of 'x'.

Even then, if 'x' changes, then the value of (10x + 6) immediately changes too.

Wikipedia has a good article on Trigonometry. It explains what each different function is, and how it relates to shapes etc. See related link.

Using a protractor helps

degrees = pi/180

180 degrees = pi

.33pi = .33 times 180 = 60 degrees

There are many.

Hahahahha assignment mani nako

Yes and it is 1 but usually it is never written down.

Similar triangles means they have the same lengths OR the corresponding lengths have equal ratios.

painting

roofing

clean gutters

hypotenuse*hypotenuse=opposite side*opposite side+adjecent side*adjecent side

because i love raine thats why raine jenkins is hot

A function that depends on the value of an angle. One way to define it is with a unit circle (a circle with center in the coordinate origin, and radius of 1). To the right is zero, from there, a positive angle is counterclockwise. In this case, the sine is simply the y-coordinate, and the cosine is the x-coordinate of the point on the circle where the ray of the angle crosses the circle. The value of the sine (and cosine) obviously depends on the angle - that's why it is considered a "function".

Sine, cosine, tangent, cotangent, cosecans, and secans can also be defined via right triangles; for more details see here: http://en.wikipedia.org/wiki/Sine#Sine.2C_cosine_and_tangent

There can be no solution set because there is no equation or inequality: only an expression. And expressions cannot be solved.

-It was made by Pythagoreas, but was discovered earlier in Asian countries, esp. China

-It only has to do with right angle triangles

-It leads into trig functions and is the basis of trigonometry

-It is used commonly nowadays

-People earlier used this to prove that not all numbers are rational!