Question

if sinA + Sin² A = 1 , then the value of cos² A + cos⁴ A is​

Answer 1

Answer:

sinA + sin2A =1

sinA = 1-sin2A

sinA = cos2A

now

cos2A+ cos4A

cos2A + (cos2)2

put cos2A =sinA

cos2A + sin2A = 1