1.

Find the value of x so that the inclination of the line joining the points (x,-3) and (2,5) is `135^(@)`

Answer» Let A(x,-3) and B(2,5) be the given points. Then slope of AB=`(5-(-3))/(2-x)=(8)/((2-x))`
But slope of AB`=tan135^(@)=tan(180^(@)-45^(@))=-tan45^(@)=-1`
`therefore (8)/((2-x))=-1 Leftrightarrow x-2=8 Leftrightarrow x=10`
Hence, x=10


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