cos a.sin a=1/2 a=?
x(x-1)=11x-36
3/8 as a decimal
2y22y^{2}2y2 -6y-20=0
4658*6
13^-5
13^-2
4658*9
1^-2
what is 1/2% of (-0.5) x (-1/4)
