Answer:
11 tan²x
Explanation:
using the identity
sin²x + cos²x = 1 ( divide through by cos²x )
+ = , that is
tan²x + 1 = sec²x
then
11sec²x - 11
= 11(tan²x + 1) - 11
= 11tan²x + 11 - 11
= 11tan²x
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