CBSE Guess > Papers > Important Questions > Class XII > 2009 > Maths > Mathematics By Anil Kumar Tondak CBSE CLASS XII Inverse Trigonometric Functions Q. 1. Find the value of: tan-1 (1) + cos-1 (-1/2) + sin-1 (-1/2). Q. 3. If tan-1 then find the value of x. Q. 4. Find the value of sin . Q. 5. Prove: sin-1 Q. 7. Prove: Q. 12. Prove:sec2 (tan-12) + cosec2 ( cot-13) = 15. Q. 13. Simplify : tan-1 Q. 14. Prove: tan-1 = Q. 16. Prove that : Prepared By Anil Kumar Tondak
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