MaxWong

This is not a true statement.

a,b,c,x,y,z do not have a fixed value.

Correct one is : Nǐ hǎo

There is a little thing on i and a.

PS: I am from Hong Kong, so Chinese people

~The smartest cookie in the world

Just google it.

Google is awesome.

~The smartest cookie in the world

18 views already :D

2 more to 20 views :)

DO NOT be racist. This is an international forum.

PS: I am an Asian myself and I found it offensive. Some Asians are not good at math.

~The smartest cookie in the world

I wonder if you can wear skirt AND pants at the same time...... lol

Total number of combination = (3+2) x 4 x 2 = 40 (3+2 is for skirt OR pants)

$30^{0.75}\\ =30^{\frac{3}{4}}\\ =\sqrt[4]{30^3}\\ =\sqrt[4]{27000}$

$8^{-1}=\dfrac{1}{8}=0.125$

:)

Step 1: $d_2\cdot v_s\cdot\cos 45^{\circ}=d_1\cdot(v_r-v_s\sin45^{\circ})$

They multiplied out the bracket on the right hand side:

$d_2\cdot v_s\cdot\cos 45^{\circ}=d_1\cdot v_r-d_1 \cdot v_s\sin45^{\circ}$

and then they add d1 . vs sin45 each side:

$d_2\cdot v_s\cdot\cos 45^{\circ}+d_1 \cdot v_s\sin45^{\circ}=d_1\cdot v_r$

Factor out the common factor(vs):

$v_s\cdot(d_2\cdot\cos 45^{\circ}+d_1\sin 45^{\circ})=d_1\cdot v_r$ <-- Step 2!!