Inverse Trigonometric Functions
Uttarakhand Board · Class 12 · Mathematics
Quick revision notes for Inverse Trigonometric Functions — Uttarakhand Board Class 12 Mathematics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Basic Concepts and Definitions
- Trigonometric functions in their natural domains are not one-one, hence inverses don't exist
- By restricting domains, we make trigonometric functions bijective (one-one and onto)
- Each inverse trigonometric function has multiple branches based on different domain restrictions
Fundamental Properties and Identities
- sin(sin⁻¹x) = x for x ∈ [-1, 1] and sin⁻¹(sin x) = x for x ∈ [-π/2, π/2]
- Similar properties hold for all inverse trigonometric functions within their domains
- Complementary relationships exist between certain inverse functions
Graphs and Geometric Interpretation
- Graph of y = f⁻¹(x) is reflection of y = f(x) about line y = x
- Domain and range of inverse function are interchanged from original function
- All inverse trigonometric functions are continuous in their domains
Applications and Problem Solving
- Solving trigonometric equations using inverse functions
- Finding exact values using reference triangles and unit circle
- Simplifying complex expressions involving multiple inverse functions
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