Same chapter3 marksDifficulty: Medium
Prove that sin−1x + cos−1x = π/2 for x in [−1, 1].
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3 marksDifficulty: Medium
Evaluate tan−1(1) + cos−1(1/2) + sin−1(1/2).
Original Khojo Papers practice question — not from a past board paper.
Answer
3π/4
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The three values are π/4, π/3 and π/6, whose sum is 3π/12 + 4π/12 + 2π/12 = 9π/12 = 3π/4.
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