Trig Graphs, Equations & Inverse Trig

01Standard wave form

• Solve sin θ = k by finding reference angle, then all co-terminal solutions + 2πn.
• Inverse trig functions use restricted ranges: arcsin ∈ [−π/2,π/2], arccos ∈ [0,π], arctan ∈ (−π/2,π/2).