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HSLG - PTLG - Coggle Diagram

- - - - Sinx = 0 <=> x = kπ ( k ∈ Z )
      - Sinx = 1 <=> x = π/2 + k2π ( k ∈ Z )
      - Sinx = -1 <=> x = -π/2 + k2π ( k ∈ Z )
  - - - Cosx = 0 <=> x = π/2 + kπ ( k ∈ Z )
      - Cosx = 1 <=> x = k2π ( k ∈ Z )
      - Cosx = -1 <=> x = π + k2π ( k ∈ Z )