Question

If sec a + tan a =m ,then sec^4 a - tan ^4 a -2sec a.tan a is what?

Answer 1

Answer:

Step-by-step explanation:

(39+42)^2/(42-54)(54-39) \

(42+54)^2/(39-42)(54-39) + (42+39)^2/(39-42)(42-54) .