Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa

Q19  Choose the correct. If  \theta is the angle between any two vectors  \vec a \: \:and \: \: \vec b , then  |\vec a \cdot \vec b |=|\vec a \times \vec b | when \theta
is equal to

 \\A ) 0 \\\\ B ) \pi /4 \\\\ C ) \pi / 2 \\\\ D ) \pi

Answers (1)

best_answer

Given in the question

\theta is the angle between any two vectors  \vec a \: \:and \: \: \vec b and |\vec a \cdot \vec b |=|\vec a \times \vec b |

To find the value of \theta

|\vec a \cdot \vec b |=|\vec a \times \vec b |

|\vec a|| \vec b |cos\theta=|\vec a|| \vec b |sin\theta

cos\theta=sin\theta

tan\theta =1

\theta =\frac{\pi}{4}

Hence option D is correct.

Posted by

Pankaj Sanodiya

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