Question

find the value of 5tan^2A-5sec^2A

Answer 1

Answer:

5 tan² A - 5 sec² A

5 ( tan²A - sec²A )

W.K.T 1 + tan²A = sec²A

∴ tan²A - sec²A = -1

5 ( -1 ) = -5

∴ The value is -5