9 sec2 A - 9 tan? A CHT HER

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9 sec ^ 2 A - 9 tan ^ 2 A = ?

9 sec^(2) A - 9 tan^(2) A =

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

Choose the coorect option. Justify choice : 9 sec^(2)A - 9 tan^(2)A =

Prove the following identities : (sec A - tan A)/ (sec A + tan A) = 1 - 2 sec A tan A + 2 tan^(2) A

9sec^2A-9tan^2 A is equal to

9sec^2A-9tan^2A is equal to (a) 1 (b) 9 (c) 8 (d) 0

9sec^(2)A-9tan^(2)A is equal to (a)1(b)9(c)8 (d) 0

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