Question

Euler's identity (a famous equality) links which of the following concepts together?

1.sine, cosine, and tangent
2.pi, e, and the Euler-Mascheroni constant
3.e, pi, and i
4.e, pi, and 20

Answer 1

3. e, pi, and i

Explanation:

Euler's identity is e^(pi×i) = -1