График смотри на рисунке ................................................................
46tg7×tg83=46tg7×tg(90-7)=<span>46tg7×ctg7=46</span>
(5*sin5a*cos5a)/14cos5a=5sin5x/7= 0,7*5/7=0,5
F(x)=3x²-7x+4
3x²-7x+4=y0=0
D=(-7)²-4*3*4=49-48=1=√1=1
x1=(-(-7)+1)/4*3=8/12=2/3
x1=2/3
x2=(-(-7)-1)/4*3=6/12
x2=1/2
x0=0
y0=3*(x0)²-7*x0+4=0-0+4
x0=0 y0=4
y0=0 x1=2/3 x2=1/2