Same chapter3 marksDifficulty: Medium
Evaluate tan−1(√3) − sec−1(−2).
Inverse Trigonometric Functions
2 marksDifficulty: Easy
Find the principal value of sin−1(−1/2) and cos−1(−1/2).
Original Khojo Papers practice question — not from a past board paper.
Answer
sin−1(−1/2) = −π/6 and cos−1(−1/2) = 2π/3
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The principal branch of the inverse sine is [−π/2, π/2] and that of the inverse cosine is [0, π].
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