solve this and show how #vectors class 12
Share
solve this and show how #vectors class 12
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Verified answer
Q. A vector makes an angle of 90°, 105°,45° with positive directions of X, Y, Z axis. Find direction ratiosSol. Direction ratios comes from the more basic idea of direction cosines.
=>Direction cosines are the cosines of angles made by a vector with coordinate axes.
=>So, Here direction cosines are
Here, l, m, n are direction cosines
=>When any constant is multiplied with the direction cosines, they are called direction ratios.
So, λl, λm, λn,are direction ratios where λ=constant
=>Direction ratios help in Simplifying calculations.
For example, if we take x= root 2, then direction ratios becomes 0,-1, 1.
Hence, calculation becomes easier with these.