FACTOID # 63: Brazil takes up 47.8% of South America.
 
 Home   Encyclopedia   Statistics   Countries A-Z   Flags   Maps   Education   Forum   FAQ   About 
 
WHAT'S NEW
RECENT ARTICLES
More Recent Articles »
 

FACTS & STATISTICS    Simple view

  1. Select countries to view: (hold down Control key and click to select several)

     

     

    Compare:

     

     
  1. Select fact or statistic: (* = graphable)

     

     

     

  2. (OPTIONAL) Compare to statistic: (both need to be graphable)

     

     

     

  3. View result as:

     

       
(OR) SEARCH ALL encyclopedia, stats & forums:   

Encyclopedia > Pythagorean trigonometric identity

The Pythagorean trigonometric identity says that for any angle A:

sin2A + cos2A = 1
Right triangle

Proof


Or:

Note


The reason for:

is that any number, when divided by itself, is equal to one.


See also


  Results from FactBites:
 
Trigonometric identity: Definition and Links by Encyclopedian.com (984 words)
...Trigonometric identity Trigonometric identity In mathematics, trigonometric...involving trigonometric functions that are true for all values of the occurring...with a trigonometric function, and then simplifying the resulting integral with a trigonometric...
In mathematics, trigonometric identities are equalities involving trigonometric functions that are true for all values of the occurring variables.
An important application is the integration of non-trigonometric functions: a common trick involves first using the substitution rule with a trigonometric function, and then simplifying the resulting integral with a trigonometric identity.
  More results at FactBites »


 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments
Please enter the 5-letter protection code

Want to know more?
Search encyclopedia, statistics and forums:
 


Lesson Plans | Student Area | Student FAQ | Reviews | Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms.