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Key Concepts
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1. Sine Function Graph
The graph of y = sin x is a wave oscillating between +1 and -1. It passes through the origin (0,0).
- Period: 2π (360°)
- Domain: All Real numbers
- Range: [-1, 1]
2. Cosine Function Graph
The graph of y = cos x starts at +1 when x=0. It is a horizontal shift of the sine graph.
3. Tangent Function Graph
The graph of y = tan x has vertical asymptotes at x = ±π/2, ±3π/2, etc., where the function is undefined.