Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

sabika13

  • 2 years ago

Given that sin pie/6 = 1/2, use an equivalent trigonometric expression to show that cos= 1/2. I have no clue how to do this, can someone help me?

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

    1 Attachment
  2. LoveUu
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @sabika13

  3. LoveUu
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    sin 30*=1/2 cos60*=1/2 u can see trignometric table for this and all for all values also

  4. sabika13
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i dont understand.. can you do it step by step

  5. LoveUu
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    If cos x = 1/2 then x = cos^(-1) (1/2) therefore, x = 60 degrees , 300 degrees {where x is greater than or equal to 0 and lesser than or equal to 360} or pi/3 radians, 5pi/3 radians {where x is greater than or equal to 0 and lesser than or equal to 2pi}

  6. sabika13
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    okay.. so we do not need to use trigonometric identities?

  7. sabika13
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the trig identities chart*

  8. LoveUu
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    is it ok?now or not?

  9. sabika13
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i think its okay.. i basically just solve sinx and cosx?

  10. LoveUu
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    which grade r u in?

  11. sabika13
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    122

  12. sabika13
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    sorry 12*

  13. LoveUu
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    o Zbrdst

  14. sabika13
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thank u for yourhelp.

  15. 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.