sin2 (4) | ||
=( | +1)*cos2(4)= | |
cos2(4) |
sin2(4)+cos2(4) | ||
= | *cos2(4)=1 | |
cos2(4) |
15 | 15√5 | 15√5 | ||||
f(−√5)= | =− | =− | =−3√5 | |||
−√5 | √5*√5 | 5 |
a2−2 | (a−√2)*(a+√2) | |||
3) | = | =a−√2 | ||
a+√2 | a+√2 |
x2−2x+1 | ||
3) | = wzór skróconego mnożenia (a−b)2=a2−2ab+b2 | |
x2−1 |
(x−1)2 | x−1 | |||
= | = | |||
(x−1)*(x+1) | x+1 |
sin24o | ||
1/ ( | +1)*cos24o= sin24o+cos24o=1 | |
cos24o |