Processing math: 100%

zaterdag 10 november 2018

Opgelost...:-)



SOLVE([2·s + 2·s + 2·s = 30, h + h + 2·s = 20, 2·f + 2·f + h = 13], [f, h, s])
[f = 2  h = 5  s = 5]
f := 2
h := 5
s := 5
s + h*f
15

Opgelost...:-)

vrijdag 9 november 2018

Proof en pudding

cos(u)+sin(u)cos(u)sin(u)=1+sin(2u)cos(2u)(cos(u)+sin(u))(cos(u)sin(u))(cos(u)sin(u))2=1+sin(2u)cos(2u)cos2(u)sin2(u)cos2(u)2sin(u)cos(u)+sin2(u)=1+sin(2u)cos(2u)cos(2u)1sin(2u)=1+sin(2u)cos(2u)cos2(2u)=1sin2(2u)sin2(2u)+cos2(2u)=1Klopt!