Drexel dragonThe Math ForumDonate to the Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.

Math Forum » Discussions » sci.math.* » sci.math

Topic: ----- ---- ----- a trig question
Replies: 1   Last Post: Mar 22, 2013 2:56 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Deep Deb

Posts: 405
Registered: 12/6/04
----- ---- ----- a trig question
Posted: Mar 22, 2013 1:59 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Consider the following two trig.equations.

s = (sin 5D)^(2/5) (1)

c = (cos 5D)^(2/5) (2)

where s and c are real numbers such that 0< c < 1 and 0<s<1; 0< D < pi/2

Statement: Both s and c cannot be rational.

Any helpful comment about the correctness of the statement and appropriate reference will be appreciated.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2015. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.