Question

If A=[012] [234] [456] B= [1-20] [01-1] [01-1]-103] then find A-B, 4B-3A.​

Answer 1

Answer:

This is a bit surprising given our initial definitions. Definition 4.11.1 The hyperbolic cosine is the function coshx=ex+e−x2, and the hyperbolic sine is the function sinhx=ex−e−x2. ◻ Notice that cosh is even (that is, cosh(−x)=cosh(x)) while sinh is odd (sinh(−x)=−sinh(x)), and coshx+sinhx=ex.