Melody

I have just added this thread to our reference material sticky note.

I do not know if other people use this but there are some really good posts in there and I use them quite often. 

Thanks Heureka  :)))

4. If x = 4 and cos θ = 5/6, find y and r

1. P(-8, 15)       radius= $${\sqrt{{\mathtt{64}}{\mathtt{\,\small\textbf+\,}}{\mathtt{225}}}} = {\mathtt{17}}$$

so

adjacent=x value=-8

opp = y value = 15

hypotenuse = radius = 17

Now you can just write down all  the trig values based on these.

2. and 3. can be finishied similarly

2. P(3, -5)      radius =  $${\sqrt{{\mathtt{9}}{\mathtt{\,\small\textbf+\,}}{\mathtt{25}}}} = {\sqrt{{\mathtt{34}}}}$$

3. P(√5, √5)       radius = $${\sqrt{{\mathtt{5}}{\mathtt{\,\small\textbf+\,}}{\mathtt{5}}}} = {\sqrt{{\mathtt{10}}}}$$

how do i write 10000010000 in scientific notation?

1.000001 x 10^10

It wasn't me Alan, I didn't put anything but I also noticed that error, I suppose I should have said so :))

I'd like to see a proof of this :))

CPhill would have thanked you quicker anon but he is very shy.   

He'll probably give you some points too, when he feels less stressed.

Come on CPhill,  don't keep the lovely lady waiting. :)))

Thanks Chris,  formulas can describe anything.  Even nut cases like ourselves :))

Seriously now - that helped a lot :))

@@ End of Day Wrap    Mon 16/2/15      Sydney, Australia      Time 6:45 am      ♪ ♫

Hi all,

It hasn't been super busy but there have been some good answers from Alan, SevenUp, CPhill, Nauseated, Aliaslanturk, gliu1, Beray, Heureka and Muhum.  Thanks all.   :)

Interest posts: