Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

zaqwsx

  • 2 years ago

prove that sin20 sin40 sin60 sin80=3/16

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

    What is your attempt so far?

  2. TO!RAW!FOR!LIFE
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    calculator.lol dats all you need

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

    Hint: \[sinx.\sin(60-x).(\sin60+x) = \frac{ \sin 3x }{ 4 }\]

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

    sin60 is \[\sqrt{3}/2\] right? put it there in that, and then apply the above formula you'll get it... \[\sqrt{3}/2\] * sin60/4 = 3/2*4*2 = 3/16

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

    • Attachments:

Ask your own question

Sign Up
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.