Question

if cos a plus sec a is 3 what is sec square plus cos square

Answer 1

Answer:

7

Step-by-step explanation:

cos a + sec a = 3

Square both sides :-

==: cos² a + sec² a + 2 cos a sec a = 9

==: cos² a + sec² a + 2 cos a * 1/cos a = 9

==: cos² a + sec² a + 2 = 9

==: cos² a + sec² a = 7

Pls mark my answer as brainlist

Pls follow me