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I'm just a beginner... An IIT aspirant..
I've started calculus and one small thing bothers me...
See... Any graph of a function that doesn't satisfy the vertical line test is not a function at all...
Hyperbolic funtion graph of sin (sinh) .. doesn't satisfy the test... but is known as a function.. why? (does the linear thing have something to do with this?)
because we must know all the types of functions and their concepts.
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