# 3 - Straight lines Questions Answers

Find the manitude vector of A and B are i+j+3j-7k are 5i-2j+4k

**Asked By: JAFARI KHATIB TULLI**7 year ago

is this question helpfull: 0 1

**read solutions ( 1 ) | submit your answer**find the distance of the point (1,-2,3) from the plane x-y+z=5 along the line x/2=y/3=z/-6 ?

**Asked By: DINESH SHARMA**7 year ago

is this question helpfull: 2 0

**submit your answer**show that line perpendicular to x-axis and a line perpendecular to y-axis having slope multipication -1

**Asked By: HARISH**8 year ago

is this question helpfull: 13 1

**submit your answer****Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

Angle between two lines is given by the formula

tanθ = (m_{1}-m_{2})/(1+m_{1}m_{2})

solve this by taking θ = 90