Directions
"If n is an integer, n * 180° represents an integer multiple of 180°, (2n + 1) * 90 represents an odd integer multiple of 90°, and so on. Decide whether each expression is equal to 0, 1, -1, or is undefined."
The question is:
cos[ (2n+1) * 90° ]
The answer in the back of the book is = 0 but I have no clue how its solved.
Any help would be great!
"If n is an integer, n * 180° represents an integer multiple of 180°, (2n + 1) * 90 represents an odd integer multiple of 90°, and so on. Decide whether each expression is equal to 0, 1, -1, or is undefined."
The question is:
cos[ (2n+1) * 90° ]
The answer in the back of the book is = 0 but I have no clue how its solved.
Any help would be great!