Here’s a chart of Greek letters used in mathematics with examples of how they are used:

Greek Letter	Uppercase	Lowercase	Name	Mathematical Example
Alpha	Α	α	Alpha	α = 30° (angle)
Beta	Β	β	Beta	β = 0.5 (coefficient)
Gamma	Γ	γ	Gamma	γ = 1.618 (golden ratio)
Delta	Δ	δ	Delta	Δx = 5 (change in x), δ = 0.001 (small change)
Epsilon	Ε	ε	Epsilon	ε → 0 (in limits)
Zeta	Ζ	ζ	Zeta	ζ = 0.8 (damping factor)
Eta	Η	η	Eta	η = 0.2 (efficiency)
Theta	Θ	θ	Theta	θ = π/4 (angle in radians)
Iota	Ι	ι	Iota	ι = index in summation notation
Kappa	Κ	κ	Kappa	κ = 2 (curvature)
Lambda	Λ	λ	Lambda	λ = 0.1 (wavelength)
Mu	Μ	μ	Mu	μ = 0.5 (mean or coefficient of friction)
Nu	Ν	ν	Nu	ν = 60 Hz (frequency)
Xi	Ξ	ξ	Xi	ξ = random variable
Omicron	Ο	ο	Omicron	Rarely used in mathematics
Pi	Π	π	Pi	π = 3.14159 (circle constant)
Rho	Ρ	ρ	Rho	ρ = 1.2 kg/m³ (density)
Sigma	Σ	σ/ς	Sigma	Σ = Σ(xi) (summation), σ = 2 (standard deviation)
Tau	Τ	τ	Tau	τ = 5 seconds (time constant)
Upsilon	Υ	υ	Upsilon	υ = speed of light in certain equations
Phi	Φ	φ	Phi	φ = 1.618 (golden ratio)
Chi	Χ	χ	Chi	χ² = chi-square statistic in hypothesis testing
Psi	Ψ	ψ	Psi	ψ = wave function in quantum mechanics
Omega	Ω	ω	Omega	ω = 2πf (angular frequency), Ω = resistance (ohms)

This table provides the Greek symbols, their corresponding names, and mathematical examples where they are typically used.