Question

6. cos4 A-sin4A is equal to
(a) 2 cos2 A +1
(c) 2 sin2 A-1
(b) A.cos2 A-1
(d) 2 sin2 A+1​

Answer 1

Answer:

b is your answer

please mark me as brilliant

Answer 2

A.cos2 A-1 is the correct answer