Melody

Nice one Heureka,     

I didn't even realise that I was being presented with 2 equations to solve simultaneously!  

I didn't understand WHAT the question was.  Perhaps you could present it a little better next time anonymous.

Heureka may not be around to interprete!   

Anyway, that is a really nice solution Heureka.  

Do you mean something like 3% of $5.60 ?

3%=3/100=0.03

0.03*5.60=0.168

That is $0.168 = 16.8 cents   = 17c to the nearest cent.

That chimp is very mascùline Stu.

He looks like a very mischievous character.  His ears could be hairier though, I think he's been to the barber recently.  He looks very dashing.    LOL.

Stu,  is your new icon a cow?

Why is it a cow?

cot is adj/opp

So the angle with the 2 in it must be A

I am really guessing here - would someone like to verify please.

Plus I do not know how to use the notation properly.

h(x)=x^2+4 (h∘h)(a)

$$\\(x^2+4)^2+4 \\
$sub in a$\\
=(a^2+4)^2+4\\
=a^4+8a^2+16+4\\
=a^4+8a^2+20\\$$

You are probably correct Quinn but I do not understand this question.  

NOTE:   On the forum calc    tan^-1 is    atan

inverse tan is the same as arc tan!

n+12/6=n+2

Sin^2x + Cos^2x = 1

that is a good question why don't we square sinx+cosx and see what happens.  

$$\\(Sinx + Cosx)^2 \\\\
=sin^2x+cos^2x+2sinxcosx\\\\
=1+2sinxcosx$$

So

$$\\(sinx+cosx)^2=1+2sinxcosx\\\\
$Taking the square root of both sides we get $\\\\
sinx+cosx=\pm\sqrt{1+2sinxcosx}$$

It can only equal one if   2sinxcosx=0       and that doesn't happen very often.        

use the calc on the home page please