My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum


Reply
 
LinkBack Thread Tools Display Modes
September 16th, 2009, 02:58 PM   #1
Newbie
 
Joined: Sep 2009

Posts: 5
Thanks: 0

Multiple Choice Problem on Using Double-Angle Formulas

Hi, I've been trying to solve this question, and I just can't get an answer that looks like one of the choices given. Could anyone walk me through the question or give me a hint that might lead me to the right answer? Thank you very much!

The question is:

Use double-angle formulas to rewrite the following expression in terms of the first power of cosine: sin^4(6x)

a) (1/2)[3/4 - cos(24x) + (1/4)cos(12x)]
b) (1/2)[3/4 - cos(12x) + (1/4)cos(24x)]
c) (1/2)[3/4 + cos(12x) + (1/4)cos(24x)]
d) (1/2)[3/4 + cos(12x) - (1/4)cos(24x)]
e) (1/2)[3/4 + cos(24x) - (1/4)cos(12x)]
peteglenn is offline  
 
September 16th, 2009, 03:41 PM   #2
Global Moderator
 
greg1313's Avatar
 
Joined: Oct 2008
From: London, Ontario, Canada - The Forest City

Posts: 7,950
Thanks: 1141

Math Focus: Elementary mathematics and beyond
http://en.wikipedia.org/wiki/List_of...ction_formulas
greg1313 is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
choice, doubleangle, formulas, multiple, problem



Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
multiple choice question sfrost Algebra 0 December 3rd, 2012 06:54 PM
double angle problem Mike7remblay Algebra 3 November 21st, 2012 09:27 AM
multiple choice panky Algebra 1 October 10th, 2011 01:04 PM
Multiple Choice Probability Problem! krzyrice Algebra 3 April 19th, 2009 12:55 PM
multiple choice related rate problem please help pranavpuck Calculus 2 December 3rd, 2008 01:16 PM





Copyright © 2019 My Math Forum. All rights reserved.