Thursday
March 30, 2017

Post a New Question

Posted by on .

Cos(pi/12) solve using half angle formula

  • calculus - ,

    cos 2A = 2cos^2 A - 1
    cos (π/6) = 2cos^2 (π/12) - 1
    √3/2 + 1 = 2cos^2 (π/12)
    cos π/12 = ±√(√3/4 + 1/2)

    but /12 is in quadrant I
    so cos (π/12) = √(√3/4 + 1/2)
    or (1/2)√(√3 + 2)

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question