how to finish the input for Euler's formula expression

[ZZ_13027099]

Say, if I want to define the expression of Euler's formula below in Mathcad, how should I finish the input for that?

[Werner_E]

You don't have to define the formula as Mathcad and also Prime are aware of it.

And what do you mean by  "finish the input" ?

As you see in the picture, the imaginary unit must be input as "1i" (without the quotes and without a multiplication in-between).

Unfortunately in Prime the imaginary unit is also shown that way. That's nicer looking in old Mathcad (here MC15 in the pic)

[StuartBruff]

As Werner says, Mathcad is already aware of the relationship - Mathcad numbers are complex by default and many functions are complex-aware.

However, if you wanted to define your own Euler equation, then you can do so as follows:

E(x) := cos(x) + 1i*sin(x)

where x is real.

Euler deserves a capital, and it avoids confusion with the built in exponent function.

Stuart

[StuartBruff · Accepted solution]

Now I've opened up my laptop ...

Stuart

[ZZ_13027099]

Appreciate it a lot, it's so clear to my confusion.