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Math Help - Trig Identity/Equation

  1. #1
    Junior Member
    Joined
    Jan 2008
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    Trig Identity/Equation

    Hey guys,

    So.. I have a trig identity/equation question from my correspondence book that I can't seem to find an answer for. Here it is:

    62) Solve each equation for 0 < x < 2pi

    c) sinx = square root (3) *cosx

    This will turn into tan x= sqr root(3)

    and it will give me x= (pi/3), (4*pi/3)

    Now, the next question is

    d) Explain why the trig equation in part (c) is not an identity.

    Is this just asking the basics of why equations are not identities? Should I say that it is because the statement is true for certain values of x? or in the case of a trig equation, and infinite number of values of x?
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  2. #2
    MHF Contributor
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    Your answers are OK for me
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