Question

If cos A + cos² A = 1, then sin² A + sin4A =
​

Answer 1

Answer:

Sin2A + Sin4A = 1

Step-by-step explanation:

given,

cosA + cos2A = 1

cosA= 1- cos2A

cosA = Sin2A

on squaring ,

cos2A = Sin4A

1- Sin2A = Sin4A

Sin2A + Sin4A = 1

Answer 2

Answer:1

Step-by-step explanation:

cosA + cos2A = 1

cosA= 1- cos2A

cosA = Sin2A

on squaring ,

cos2A = Sin4A

1- Sin2A = Sin4A

Sin2A + Sin4A = 1