Question

(40 points)

Answer 1

Answer:

${ \sec}^{2} x - { \tan}^{2} x = 1 \\ \\ { \sin}^{2} x + { \cos }^{2} x = 1$

Answer 2

Answer:

sec²x - tan²x = 1

sin²x + cos²x = 1

These two among the following are correct trigonometric identities.