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Choose the correct option. Justify your choice. (i) `9sec^2A-9tan^2A=` (a) 1 (b) 9 (c) 8 (d) 0

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Choose the correct option. Justify your choice.
(i) `9sec^2A-9tan^2A=`
(a) 1 (b) 9 (c) 8 (d) 0
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1 Answer

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Best answer
Here =`9sec^2A-9tan^2A`
=`9(sec^2A-tan^A)`
=9(1)
=9
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