Q. 4 A4.4( 182 Votes )

# Choose the correct option. Justify your choice.

A. 1

B. 9

C. 8

D. 0

Answer :

Following is the explanation:

9 sec^{2} A – 9 tan^{2} A

= 9 (sec^{2} A – tan^{2} A)

= 9 x 1

= 9

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