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Math Help - if cos (23)=P, without calculator, find in terms of P Tan (203).

  1. #1
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    if cos (23)=P, without calculator, find in terms of P Tan (203).

    This is the question

    if cos (23)=P, without calculator, find in terms of P Tan (203).

    I know that im going to start with
    tan (180+23). But I dont know whats going to be the next step?

    Im stuck with this

    so im using this formula

    tan(x+y)=tan180+tan23
    --------------
    1-tan180tan23

    but Im stuck with this please help. Thanks in advance!
    Last edited by mr fantastic; April 6th 2009 at 03:52 PM. Reason: Question deleted by OP, question restored.
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  2. #2
    MHF Contributor red_dog's Avatar
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    \tan(180+23)=\tan 23 (180 is the period of tan)

    \tan 23=\frac{\sin 23}{\cos 23}=\frac{\sqrt{1-\cos^223}}{\cos 23}=\frac{\sqrt{1-P^2}}{P}
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  3. #3
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    thank u!
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