my question is that slope=tan(angle) slope can be 1,2,3,..,9,0 but tan(angle) can be 0,1 or b/w the intervals or infinity. so how they can be equal.
Who says that [itex]0 \le tan \enspace \alpha \le 1 [/tex] ? That's only true for [itex]0^\circ \le \alpha \le 45 ^\circ [/tex] Try these on your calculator (in degree mode): TAN 85 TAN 100
It seems that the OP is confused about many things. It's hard to even know where to start with this one.