1.

Find the angle between the X-axis and the line joining the points `(3,-1)a n d (4,-2)dot`

Answer» Let A(3,-1) and B(4,-2) be the given points and let m be the slope of the line AB. Then, `m=(-2-(-1))/(4-3)=(-2+1)/(1)=-1" "[therefore m=((y_(2)-y_(1)))/(x_(2)-x_(1))]`
Let `theta` be the angle between the x-axis and the line AB. Then, `tan theta=m=-1=tan 45^(@)=tan(180^(@)-45^(@))=tan135^(@)`
`therefore theta=135^(@)`
Hence, teh required angle is `135^(@)`


Discussion

No Comment Found

Related InterviewSolutions