Why am I receiving this error?

a = 3*cos(pi)-2*ln⁡(3)+e^4

Error: File: matlabassignment1.m Line: 9 Column: 19

Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII characters.

[Christina]

a = 3*cos(pi)-2*log⁡(3)+e^4

is also invalid

Answer 1

[Paul]

Assuming you want a numerical evaluation, check out these doc pages: log , exp

Answer 2

[Matt J]

Try deleting line 9 and retyping it.

Answer 3

[Walter Roberson]

In between the n and the ( you have unicode character decimal 8289, which is known as "Function Application". It is an invisible character in most fonts

Note: e^4 should be written as exp(4) and ln(3) should be log(3)

There turn out to be relatively few programming languages that use ln to indicate logarithm.