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Identities homework problem

  • Thread starter dranseth
  • Start date
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1. Homework Statement
I'm on the last section of identities entitled half angle identities. This one seems to give me some trouble because I have never encountered one with a horizontal shift in it. Tips?

tan 1/2( ß + π/2 ) = ( 1 + sin ß ) / cos ß
 

Answers and Replies

Tom Mattson
Staff Emeritus
Science Advisor
Gold Member
5,474
20
Recall that:

[tex]\tan(\theta)=\frac{\sin(\theta)}{\cos(\theta)}[/tex]

Now, what do the graphs of the sine and cosine functions look like when you shift them to the left by [itex]\frac{\pi}{2}[/itex] rad?
 

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