Asked by briana
                verify : [sec(x) / csc(x) - cot(x)] - [sec(x) / csc(x) + cot(x)] = 2csc(x)
            
            
        Answers
                    Answered by
            MathMate
            
    Use the following identities to express everything in sin(x), cos(x), tan(x) and cot(x):
sec(x)=1/cos(x)
csc(x)=1/sin(x)
Unless there is a typo on the right-hand-side, I find the given <i>identity</i> not true.
    
sec(x)=1/cos(x)
csc(x)=1/sin(x)
Unless there is a typo on the right-hand-side, I find the given <i>identity</i> not true.
                    Answered by
            briana
            
    i put it in my graphing calculator, though, and they graph the same function
    
                    Answered by
            MathMate
            
    This is why I suspected there is a typo.
The left-hand-side evaluates to -2csc(x).
The right-hand-side, 2*csc(x).
I suggest you recheck the expressions posted.
Here's a plot of each side of the identity <i>as posted</i>.
http://img508.imageshack.us/img508/3851/1294005524.png
    
The left-hand-side evaluates to -2csc(x).
The right-hand-side, 2*csc(x).
I suggest you recheck the expressions posted.
Here's a plot of each side of the identity <i>as posted</i>.
http://img508.imageshack.us/img508/3851/1294005524.png
                    Answered by
            MathMate
            
    The left-hand-side evaluates to -2cot(x).
    
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