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Algebra readiness

Read sine, cosine and tangent graphs · Diagrams

Sine cosine and tangent graphs

Read one trigonometric graph at a time

Domain: all real inputs. Range: [−1, 1]. Period: 2π. Sine is odd: sin(−x) = −sin x.

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Read a trigonometric graph

  1. Choose the function and interval.
  2. Mark intercepts and excluded poles.
  3. Use the period to repeat the pattern.
Three source graph panels over minus 2pi to 2pi: sine and cosine range from minus 1 to 1 with period 2pi; sine is odd and cosine even. Tangent is odd with periodpi, separate increasing branches, and excluded vertical asymptotes at odd multiples of pi/2.
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