Correct layout of e^/LN/10^/LOG?

[dm319]

(10-25-2024 09:39 AM)Johnh Wrote:  This helps to keep in mind the basic relationships between the sides of a right triangle and I think we dont need the extra names.

True, though I was wondering how we ended on cos/sin/tan as the ones placed directly on the buttons. Bob's reply stimulated to me to do a bit of digging. It looks like we could just as well have sin, sec and tan and be relatively happy given sec is the inverse of cos, you can still calculate your angle-adjacent-hypotenuse relationships without problem.

But! there are reasons which I found in this maths stack exchange question. The most convincing ones that argue against it are:

1. sin x and cos x represent x,y coordinates, which is convenient
2. cos is continuous, sec has undefined spots.