Exercise problems III — task. Mathematics CBSE, Class 10.

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Choose the correct option. Justify your choice.

(i) \(9 sec^2 A – 9 tan^2 A=\)

\(9\)
\(1\)
\(0\)
\(8\)

(ii) \((1 + tan \theta + sec \theta) (1 + cot \theta – cosec \theta)\)

\(0\)
\(2\)
\(1\)
\(-1\)

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