Asked by Natash
                simplify and write the trigonometric equation in terms of sine and cosine.
tan^2x-sec^2x
            
            
        tan^2x-sec^2x
Answers
                    Answered by
            drwls
            
    You have not provided an equation. 
Equations have an "=" sign.
You must have left something out.
Perhaps they just want you to write the term tan^2x-sec^2x in terms of sines and cosines. If so, they should have said so.
    
Equations have an "=" sign.
You must have left something out.
Perhaps they just want you to write the term tan^2x-sec^2x in terms of sines and cosines. If so, they should have said so.
                    Answered by
            Reiny
            
    from the main Pythagorean Identity we know
tan^2 x + 1 = sec^2 x
so tan^2x-sec^2x = tan^2 x - (tan^2 x + 1)
= -1
    
tan^2 x + 1 = sec^2 x
so tan^2x-sec^2x = tan^2 x - (tan^2 x + 1)
= -1
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