We know that sin 3x = 3 sin x - 4 (sin x)^3
Now sin B is given as 1/4.
sin 3B = 3 sin B - 4(sin B)^3
=> 3* (1/4) - 4(1/4)^3
=> 3/4 - 1/16
=> (12 - 1)/16
=> 11/16
Therefore sin 3B = 11/16
We’ll help your grades soar
Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.
- 30,000+ book summaries
- 20% study tools discount
- Ad-free content
- PDF downloads
- 300,000+ answers
- 5-star customer support
Already a member? Log in here.
Are you a teacher? Sign up now