Melody

If you are using the web2 calc on the home page then press = once and you get the answer,

press = twice and you get it in scientific notation. :)

Yes it is very important. 

If you understand it there is really nothing to remember but it makes many trig problems much easier.

So put some effort into understanding what it represents.

Here is a clip on it

$${\mathtt{\pi}}{\mathtt{\,\times\,}}{{\mathtt{3}}}^{{\mathtt{2}}} = {\mathtt{28.274\: \!333\: \!882\: \!308\: \!139\: \!1}}$$     cm^2

1.) Find all values of x for which the line that is tangent to y = 3x - tanx is parallel to the line y - x = 2

ALWAYS remember that when you differentiate you are finding the gradient to the tangent of a curve

$$\\y=3x-tanx\\
y'=3-sec^2x\\\\
y-x=2\\
y=x+2\\
y'=1\\\\
1=3-sec^2x\\
-2=-sec^2x\\
2=sec^2x\\
\frac{1}{2}=cos^2x\\
cos x = \pm\frac{1}{\sqrt2}\\
x= n\pi\pm \frac{\pi}{4}\qquad n\in Z$$

8^5

The hat or caret   ^   is the symbol for power of

$${{\mathtt{8}}}^{{\mathtt{5}}} = {\mathtt{32\,768}}$$

Where is your working Bertie LOL

Don't worry, I'll take your word for it :)

I didn't know that,  thanks Alan.

Thanks guys,

sometimes it pays to finish a question. 

I suppose it also pays to look at a question sensibly before plowing headlong into the algebra   :)

Thanks Alan,

I like this question :)

Thanks Chris :)