Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

shahzadjalbani

  • 2 years ago

Why is the product of the gradients of 2 straight line perpendicular to each other is always equal to -1 ?? Please prove it......?

  • This Question is Closed
  1. shirleyx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    m1=1/m2 you can use two rules (straight line) to prove it. |dw:1338626026029:dw|

  2. shahzadjalbani
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Give me a hint?

  3. myko
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you can write equation of the lines perpedicular to each other in this form: ax+by=0 -bx+ay=0 this is a hint....:)

  4. shahzadjalbani
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Can you prove it through trigonometry?

  5. shahzadjalbani
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @myko @shirleyx Can you prove it through trigonometry?

  6. experimentX
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    slope = \( \tan(\theta) \) another slope = \( \tan(\theta - 90) = -\cot \theta \)

  7. myko
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\cos \alpha x+\sin \alpha y =0\] \[-\sin \alpha x + \cos \alpha y =0\]

  8. myko
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    grad f1 = (cosa -sinax,sina+cosay) grad f2 = (-sina-cosax,cosa-sinay)

  9. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.