- #1
schattenjaeger
- 178
- 0
cos(x) + cos3x + cos5x +………cos(2n -1)x=sin[2nx]/{2sinx}
Hint: Use Euler’s formula and the geometric progression formula.
Err, I know Euler's formula, or at least a version of it, but I don't see how that helps here, so yah, how's that work, since it obviously does?
Hint: Use Euler’s formula and the geometric progression formula.
Err, I know Euler's formula, or at least a version of it, but I don't see how that helps here, so yah, how's that work, since it obviously does?