Melody

Hayley1   That is the equation of a line.  Maybe it is not a line :///    

This is what Hayley is talking about.

And, I am with CPhill - that was a top answer Hayley.

The program we use to draw pictures like this is called GeoGebra.  It is a download.  

It is commonly used by schools so you can probably get permission to download it.

Anyone who has an interest in drawing maths 'pics' should download it (for free) and have a play :)

AND that is the first time I have tried Alan's method of uplading a tiny pic image.

It was a bit slower but I guess I will get faster at it.   :D

Thanks Alan   

That is a really good answer Will85237

I'll show you another approach :)
     

If sine of Theta=0.4, what is the value of cosine of Theta?

0.4= 2/5

Draw a right angled triangle and label one of the acute angles as theta.

sine theta = 2/5

so mark the opposite side as 2 and the hypotenuse as 5

The adjacent side will be sqrt(25-4) = sqrt(21)

So cos(theta) = sqrt(21)/5 = sqrt(0.84)    which is exactly what Will found.

Theta could also be  in  the 2nd quadrant. In this case cos(theta) = -sqrt(21)/5 

InjustaGod, you mad a little error with the fraction, you should try to edit it out :/

Asker, what do you need to know about remainders?

whats the distance between -12 and -5

They are both negative so it is only 7 jumps on the number line,

also

distance = big one - little one = -5- - 12 = -5+12 = 7

{nl} Guest {nl} 11 mins ago     

What's 2.5! ?  

http://www.wolframalpha.com/input/?i=2.5%21

A 3.32038

B 3.32335

What's 0 ÷ 0 ?     undefined

A ∞

B indefinite

What's 0^0 ?     undefined

A 1

B indefinite    

11/12 - 1/6

Thanks guest but I think you made a small mistake  :(

11/12 - 2/12 = 9/12 = 3/4

what do I find cot0=12.3

\(cot\theta = 12.3\\ tan\theta = 1\div 12.3\\ atan(1/12.3) = 4.648 \;degrees\\ \theta = 4.648 +180n\quad degrees \qquad n\in Z \)

Thanks guest

can (x^4) + (5x^2) +4 be simplified to (x^2) + (5x) + 2

Here is another way of showing you.

Let x=3

LHS= 81+45+4 = 130

RHS = 9 + 15 +2 = 36

They are not equal :(

v/5 -6=3 What's the number for v?

Start by adding 6 to both sides and then tell me what you have :/