Math Chapter Wise Properties Of Triangle And Circular Inverse Function English MCQ Haryana PGT 2018 Q.If sin–1 π x =, 5 for some x ∈ (–1, 1), then the value of cos–1 x is: A9 10 π B7 10 π C3 10 π D10/π Show answer Correct answer: 3 10 π