Go Back  Bike Forums > The Lounge > Foo
Reload this Page >

trig help

Foo Light hearted off-topic chit chat with no general subject.

trig help

Old 01-26-08, 04:30 PM
Senior Member
Thread Starter
madfiNch's Avatar
Join Date: Jul 2007
Location: Minneapolis, MN
Posts: 255

Bikes: Burley Runabout 7 and Specialized Allez Elite

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
trig help

omg. I take 8 months off college to work a co-op and I've forgotten everything I've ever learned. Please help me. I feel like such a moron, but I've been trying to figure this out for a long time now.

I'm supposed to convert an equation in the form of y=cos(at+b) into the form of RE{Be^(jwt)}.
I get how to do that part. The problem is that I can't for the life of me figure out how to combine the real parts of the equation into one cosine function. It's in this form:

Acos(bt+c) + sin(bt)

I know I need to get it all into cosine, but I dunno how..? I know I'm going to feel stupid when I figure it out, but I've spent way too long on this already..
madfiNch is offline  
Old 01-26-08, 04:42 PM
Taerom's Avatar
Join Date: Jun 2005
Location: Quarantine
Posts: 727

Bikes: 2005 Trek Liquid 55, 2009 Haro Mary SS

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Math with letters?! AAAHHHH!! *head explodes*
Taerom is offline  
Old 01-26-08, 05:22 PM
cab horn
Join Date: Jun 2004
Location: Toronto
Posts: 28,353

Bikes: 1987 Bianchi Campione

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Likes: 0
Liked 23 Times in 17 Posts
Originally Posted by Taerom View Post
Math with letters?! AAAHHHH!! *head explodes*
This post matches said avatar perfectly
operator is offline  
Old 01-26-08, 05:47 PM
Cries on hills
supton's Avatar
Join Date: Jun 2007
Location: Central NH
Posts: 1,088

Bikes: 2007 Trek Pilot 1.2, 1969 Raleigh Sprite 5

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 83 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I think you're looking for Euler's identity:
supton is offline  
Old 01-26-08, 07:54 PM
Life is good
RonH's Avatar
Join Date: Jan 2001
Location: Not far from the Withlacoochee Trail. 🚴🏻
Posts: 18,210

Bikes: 2018 Lynskey Helix Pro

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 522 Post(s)
Likes: 0
Liked 9 Times in 9 Posts
Chebyshev's cube root looks pretty confusing.

My son calls me about once a month needing help with college algebra. Now he's starting calculus. I tell him it's been toooooo many years since I've used or studied that stuff. Then I send him to Wikipedia.
The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8

I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.
RonH is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.