plane and straight lines + intersection points | 3d geometry explained

angle between two lines | revision 3d geometry | #class12

angle b/w two lines | straight lines class 12 | 3d geometry one shot

Q) If the direction cosines of a line are 𝜆,𝜆,𝜆, then 𝜆 is #threedimensionalgeometry

Q) If the direction cosines of a line are 𝜆,𝜆,𝜆, then 𝜆 is #threedimensionalgeometry

Q) The line x=1+5μ , 𝑦=−5+ 𝜇, 𝑧=−6− 3𝜇 𝑝𝑎𝑠𝑠𝑒𝑠 𝑡ℎrough which of the following point ?

Q) Verify that lines given by 𝑟 =(1−𝜆)𝑖 +(𝜆−2)𝑗 +(3−2𝜆)𝑘and 𝑟 =(𝜇+1)𝑖 +(2𝜇−1) 𝑗 −(2𝜇+1

Q) If a line makes angles of 3𝜋/4,𝜋/3 and 𝜃 with the positive directions of 𝑥,𝑦 and z -axis