Could anyone help on this trig identity? I have a quiz tomorrow and am unsure on this one. 2 cos squared x- 5 cosx+ 2= 0 Any help is appreciated!
Last edited by mr fantastic; Feb 16th 2011 at 05:38 PM. Reason: Re-titled.
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Do you mean solve this equation for ? If so make and solve the quadratic
Originally Posted by powerduffgirL Could anyone help on this trig identity? I have a quiz tomorrow and am unsure on this one. 2 cos squared x- 5 cosx+ 2= 0 ... recommend you find out the difference between identities and conditional equations.
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