For the curve (y=a ,log ,sec( frac{x}{a}) ) what is the value of ( – McqOptions

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1.	For the curve (y=a ,log ,sec( frac{x}{a}) ) what is the value of ( frac{ds}{dx} )? (where is the angle made by tangent to the curve with x-axis)?
A.	cos
B.	sec
C.	tan
D.	cot
Answer» C. tan

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