9.5Which of the following statement is incorrect ?(a) sine--(b) cose-1 – InterviewSolution

1.	9.5Which of the following statement is incorrect ?(a) sine--(b) cose-1(c) sec θ(d) tane 20-21-0 is
Answer» option C , because sec∅ belongs to (-∞,-1] U [1,∞)

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