Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Please solve RD Sharma Class 12 Chapter 26 Directions Cosines and Direction Ratio Exercise Multiple Choice Question, question 7 Maths textbook solution.

Please solve RD Sharma Class 12 Chapter 26 Directions Cosines and Direction Ratio Exercise Multiple Choice Question, question 7 Maths textbook solution.

Answers (1)

Answer:

(a)\sqrt{b^2+c^2}

Hint: Use distance formula

Given: Point P(a,b,c)

To Find: Distance of point P from x-axis

Solution:

The distance of the point (a,b,c) from x-axis will be perpendicular distance from point (a,b,c) to x-axis whose coordinates are (a,0,0)

Distance formula is given by

\begin{aligned} &d=\sqrt{\left(x_{2}-x_{1}\right)^{2}+\left(y_{2}-y_{1}\right)^{2}+\left(z_{2}-z_{1}\right)^{2}} \\ &d=\sqrt{(a-a)^{2}+(0-b)^{2}+(0-c)^{2}} \end{aligned}

where

\begin{aligned} &\left(x_{1}, y_{1}, z_{1}\right)=(a, b, c) \&\left(x_{2}, y_{2}, z_{2}\right)=(a, 0,0) \\ &d=\sqrt{b^{2}+c^{2}} \end{aligned}

Therefore, option

(a)\sqrt{b^2+c^2} is correct

Posted by

infoexpert24

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

PM Modi's Pariksha Pe Charcha 2025 to be held next month, registrations open till January 14
anam-khan

CBSE Board Exams 2025: Online portal for availing exemptions by CWSN students opens
anam-khan

Board Exams: States agree to equivalence; no question paper ‘jumbling’ from next year, says PARAKH CEO

Latest Question