Question:

Find sin2A if sinA=1/4 and 0<= A <= π/2?

by  |  earlier

0 LIKES UnLike

show work thnx!

 Tags:

   Report
Answer The Question I've Same Question Too

1 ANSWERS

Sort By: Date  |  Rating

  1. sin(2A) = 2 sin(A) cos(A)

    |cos(A)| = √(1 - sin²(A)) = √(1 - (1/4)²) = (√15)/4

    If 0 ≤ A ≤ π/2, then the cosine is positive, and so

    cos(A) = (√15)/4

    Therefore,

    sin(2A) = 2(1/4)((√15)/4) = (√15)/8

You're reading: Find sin2A if sinA=1/4 and 0<= A <= π/2?

Question Stats

Latest activity: earlier.
This question has 1 answers.

BECOME A GUIDE

Share your knowledge and help people by answering questions.
Register Now