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Angle Between Vectors cos(θ) = (a·b) / (|a| × |b|) Vector A (x, y): Vector B (x, y): Calculate Angle

Bayes’ Theorem Calculator P(A|B) = P(B|A) × P(A) / P(B) P(A) – Prior probability:P(B|A) – Likelihood:P(B) – Total probability:Calculate P(A|B)

T-Test Calculator Two-sample t-test: Are sample means significantly different? Sample 1 (comma-separated):Sample 2 (comma-separated):Calculate T-Test Results Mean 1 = Mean

Poisson Distribution P(X=k) = (e^-λ × λ^k) / k! Lambda (λ) – average events:k – number of events:Calculate Probability Result

Distance: Point to Plane d = |ax₀ + by₀ + cz₀ + d| / √(a² + b² + c²) Plane

Normal Distribution Calculator Z = (X – μ) / σ | Find probability Mean (μ):Std Dev (σ):Value (X):Calculate Results Z-Score

Linear Regression Analysis y = mx + b | Find best-fit line X values (comma-separated):Y values (comma-separated):Calculate Regression Results Slope

Complex Number Operations Addition, Subtraction, Multiplication of a+bi and c+di Z₁ = a + bi Z₂ = c + di

3D Vector Cross Product a × b = (a₂b₃ – a₃b₂, a₃b₁ – a₁b₃, a₁b₂ – a₂b₁) Vector A: Vector

Matrix Determinant Calculator det(A) for 2×2 and 3×3 matrices Matrix Size:2×23×3 Calculate Determinant Result det(A) =