prove that period of cosin function is 2π
sin(x)-cos(x)
factorize 4a squared + 20a
roe haerodat
factorize 27q+45
722+400+720=
3x-7y-2z+2u=- 9
-3x+5y+z=5
6x-4y-5u=7
-9x+5y-5z+12u=11
what is the algebra
what r the alagorithams
($a^{2}$- $a^{2}$* $\pi$/4)/ $a^{2}$
