Math Forum game Yay!
Here you can challenge other members with math problems or give links to quiz sites here visit this one, I rather enjoy it. This is fun.
http://users.adelphia.net/~sismondo/VisCalc.html and here's the first question
127x16 divided by 4 is what % of 1000?
A)25 B)58 C)54 D)52 E)none of these
Be careful choose wisely.
E) None of the above
E)none
60.4%
I hate math soooo much.
Picture this:
Two cars are placed on a ceratin point in a highway facing oposite directions (they are on the same point). Car A drives at 50 miles/hr and car B drives at 60 miles/hr for HALF an hour. They both make a right turn. Car A then drives at 10 miles/hr while car B drives at 20 miles/hr for another half hour before they both stop. How far away are the cars from each other?
(A) 15 miles (B) 55 miles (C) 70 miles (D) 57 miles (E) 63 miles
(D)
...approximately.
*golden star*
Yay! Banzai!
Here's a question from last years HSC (this is 2U only, so it's a cinch):
---
Show that cos x . tan x = sin x
And hence solve 8sinx . cos x . tan x = cosec x (for values between zero and 2pi)
I got 50.8 :OOriginally Posted by radyk05
tan x = sin x/ cos x
so
cos x * sin x/ cos x = sin x (cancel the cosines)
8*sin x * cos x * tan x = 8*(sin x)^2
del mordor: oops....
I think the 8 was a mistake.
You haven't solved for x, nor proved that it's equal to cosec x.
And yes, the 8's supposed to be there.
no matter
sin x * cos x * tan x = (sin x)^2
sinČ x does not equal cosec x.
And there IS an 8.
cosec x doesn't equal sin^2. cosec x = 1/sin x
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