Tanh
Domain: AI Fundamentals
🎯 Motivation
Like sigmoid but outputs range -1 to 1, centered at zero. Often works better in hidden layers.
📋 Concrete Example
Tanh(0) = 0, Tanh(2) is about 0.964, Tanh(-2) is about -0.964.
🔗 Analogy
Like a steering wheel that can turn left (negative) or right (positive) but only so far each way.