Question

value of 9 sec^2A - 9 tan^2A =??
(ans - 9)
explain it pls
(unable to ask questions in maths(glitch,sorry)
correct answer will be the brainliest.

Answer 1

Answer:

9

Explanation:

We have,

>> 9 sec²A - 9 tan²A

To find,

>> Simplified value ?

Solution,

=> 9 sec² A - 9 tan²A

∵ sec²A = (1 + tan²A)

=> 9(1 + tan²A) - 9 tan²A

=> 9 + 9 tan²A - 9 tan²A

=> 9

∴ 9 is the simplified value of 9 sec²A - 9 tan²A.