Class 12 Inverse Trigonometric Functions · Mcq Single Correct1 Marksprincipal_values
Class 12 Maths · Inverse Trigonometric Functions · Mcq Single Correct #5
Evaluate \(\sin^{-1}(\cos(\pi/9))\).
✅ Step-by-Step Solution
Final Answer: Option (D): \(7\pi/18\)
- cos(π/9)=sin(π/2−π/9)=sin(7π/18); this angle is within the arcsine principal interval.
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CBSE Class 12 Mathematics 2026 Main Paper 65/1/1 · Q1
If 2 cos⁻¹ x = y, then